A multiplication table for the Cheela

Question

The Cheela (from the book Dragon's Egg by Robert L. Forward) are creatures that live on the surface of a neutron star. Their body is flat and circular with twelve eyes on the perimeter, so they naturally use a base-12 numbering system.

Among the Cheela, care of the hatchlings and education of the young are tasks carried out by the Old Ones. Since young Cheela need to be taught how to multiply, the Old Ones could use a multiplication table.

Your task is to produce a 12x12 multiplication table in base 12, like the following. Uppercase letters A and B are used for digits corresponding to decimal 10 and 11 respectively.

  1   2   3   4   5   6   7   8   9   A   B  10 
  2   4   6   8   A  10  12  14  16  18  1A  20 
  3   6   9  10  13  16  19  20  23  26  29  30 
  4   8  10  14  18  20  24  28  30  34  38  40 
  5   A  13  18  21  26  2B  34  39  42  47  50 
  6  10  16  20  26  30  36  40  46  50  56  60 
  7  12  19  24  2B  36  41  48  53  5A  65  70 
  8  14  20  28  34  40  48  54  60  68  74  80 
  9  16  23  30  39  46  53  60  69  76  83  90 
  A  18  26  34  42  50  5A  68  76  84  92  A0 
  B  1A  29  38  47  56  65  74  83  92  A1  B0 
 10  20  30  40  50  60  70  80  90  A0  B0 100

The output shoud be printed on screen. The format should be as follows:

1. Numbers should be aligned to the right within each column.
2. Leading spaces before the first column, trailing spaces after the last column, or a trailing new line after the last row are allowed.

3. Separation between columns can be one space (as shown above) or more than one space, but the number of spaces should be consistent between columns. To measure column separation, consider that displayed numbers include any leading spaces that may have been necessary fo fulfill requirement 1 (so each number occupies three characters, the first of which may be spaces). For example, the table with two-space separation would be as follows:

     1    2    3    4    5    6    7    8    9    A    B   10 
     2    4    6    8    A   10   12   14   16   18   1A   20 
     3    6    9   10   13   16   19   20   23   26   29   30 
     4    8   10   14   18   20   24   28   30   34   38   40 
     5    A   13   18   21   26   2B   34   39   42   47   50 
     6   10   16   20   26   30   36   40   46   50   56   60 
     7   12   19   24   2B   36   41   48   53   5A   65   70 
     8   14   20   28   34   40   48   54   60   68   74   80 
     9   16   23   30   39   46   53   60   69   76   83   90 
     A   18   26   34   42   50   5A   68   76   84   92   A0 
     B   1A   29   38   47   56   65   74   83   92   A1   B0 
    10   20   30   40   50   60   70   80   90   A0   B0  100
   

Computer storage on a neutron star is really expensive, so your code should use as few bytes as possible.

Extended challenge and bonus

Ideally your code should be reused in other parts of the universe, where other numbering systems may be in use. To that end, the challenge is optionally extended as follows: Your code accepts a number N as input and generates an NxN multiplication table in base N, with the above format.

Input may be from keyboard or as a function argument. The program or function should work for 2 ≤ N ≤ 36, using as digits the first N characters of the sequence 0, 1, ..., 9, A, B, ..., Z (uppercase letters)

This extended challenge is optional. If you follow this route, take 20% off your byte count (no need to round to an integer number).

Answer 1

Pyth, 27 * 0.8 = 21.6

VSQsm.[\ 4jkXj*dNQrT99rG1SQ

Try it online: Demonstration

Explanation:

VSQsm.[\ 4jkXj*dNQrT99rG1SQ   implicit: Q = input number
VSQ                           for N in [1, 2, ..., Q]:
    m                    SQ      map each number d in [1, 2, ..., Q] to:
              *dN                   N * d
             j   Q                  in base Q
            X     rT99rG1           replace the numbers [10, 11, ..., 98] with "A...Z"
          jk                        join to a string
     .[\ 4                          prepend spaces, so that the string has a length of 4
   s                             join all strings and print

Answer 2

CJam, 33 * 0.8 = 26.4 bytes

ri:C,:)_ff{*Cb{_9>{'7+}&}%4Se[}N*

Test it here.

This uses the minimum required separation.

Explanation

ri:C        e# Read input, convert to integer, store in C.
,:)         e# Get range [1 2 ... C].
_ff{        e# 2D-map over all repeated pairs from that range...
  *Cb       e#   Multiply, convert to base C.
  {         e#   Map over the digits...
    _9>     e#     Check if the digit is greater than 9.
    {'7+}&  e#     If so, add the digit to the character "7", to get "A" to "Z".
  }%
  4Se[      e#   Pad the digits with spaces from the left, to 4 elements.
}
N*          e# Join with linefeeds.

Table for input 22 (the largest that fits in the post without a horizontal scrollbar):

   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F   G   H   I   J   K   L  10
   2   4   6   8   A   C   E   G   I   K  10  12  14  16  18  1A  1C  1E  1G  1I  1K  20
   3   6   9   C   F   I   L  12  15  18  1B  1E  1H  1K  21  24  27  2A  2D  2G  2J  30
   4   8   C   G   K  12  16  1A  1E  1I  20  24  28  2C  2G  2K  32  36  3A  3E  3I  40
   5   A   F   K  13  18  1D  1I  21  26  2B  2G  2L  34  39  3E  3J  42  47  4C  4H  50
   6   C   I  12  18  1E  1K  24  2A  2G  30  36  3C  3I  42  48  4E  4K  54  5A  5G  60
   7   E   L  16  1D  1K  25  2C  2J  34  3B  3I  43  4A  4H  52  59  5G  61  68  6F  70
   8   G  12  1A  1I  24  2C  2K  36  3E  40  48  4G  52  5A  5I  64  6C  6K  76  7E  80
   9   I  15  1E  21  2A  2J  36  3F  42  4B  4K  57  5G  63  6C  6L  78  7H  84  8D  90
   A   K  18  1I  26  2G  34  3E  42  4C  50  5A  5K  68  6I  76  7G  84  8E  92  9C  A0
   B  10  1B  20  2B  30  3B  40  4B  50  5B  60  6B  70  7B  80  8B  90  9B  A0  AB  B0
   C  12  1E  24  2G  36  3I  48  4K  5A  60  6C  72  7E  84  8G  96  9I  A8  AK  BA  C0
   D  14  1H  28  2L  3C  43  4G  57  5K  6B  72  7F  86  8J  9A  A1  AE  B5  BI  C9  D0
   E  16  1K  2C  34  3I  4A  52  5G  68  70  7E  86  8K  9C  A4  AI  BA  C2  CG  D8  E0
   F  18  21  2G  39  42  4H  5A  63  6I  7B  84  8J  9C  A5  AK  BD  C6  CL  DE  E7  F0
   G  1A  24  2K  3E  48  52  5I  6C  76  80  8G  9A  A4  AK  BE  C8  D2  DI  EC  F6  G0
   H  1C  27  32  3J  4E  59  64  6L  7G  8B  96  A1  AI  BD  C8  D3  DK  EF  FA  G5  H0
   I  1E  2A  36  42  4K  5G  6C  78  84  90  9I  AE  BA  C6  D2  DK  EG  FC  G8  H4  I0
   J  1G  2D  3A  47  54  61  6K  7H  8E  9B  A8  B5  C2  CL  DI  EF  FC  G9  H6  I3  J0
   K  1I  2G  3E  4C  5A  68  76  84  92  A0  AK  BI  CG  DE  EC  FA  G8  H6  I4  J2  K0
   L  1K  2J  3I  4H  5G  6F  7E  8D  9C  AB  BA  C9  D8  E7  F6  G5  H4  I3  J2  K1  L0
  10  20  30  40  50  60  70  80  90  A0  B0  C0  D0  E0  F0  G0  H0  I0  J0  K0  L0 100

Answer 3

MATL, 42*.8 = 33.6

Disclaimer

Since the creator of the language and the author of the challenge are the same, this answer is not eligible for winning.

For a discussion on whether this restriction is necessary or not, see this meta question.

Code

iXK:t!*Y)KYAZ{'(?<=^0*)0'32cYXZc32hK4*[]e!

This uses the minimum separation.

Example

Octal multiplication table

>> matl
 > iXK:t!*Y)KYAZ{'(?<=^0*)0'32cYXZc32chK4*[]e!
 > 
> 8
  1   2   3   4   5   6   7  10 
  2   4   6  10  12  14  16  20 
  3   6  11  14  17  22  25  30 
  4  10  14  20  24  30  34  40 
  5  12  17  24  31  36  43  50 
  6  14  22  30  36  44  52  60 
  7  16  25  34  43  52  61  70 
 10  20  30  40  50  60  70 100 

Explanation

i              % input number, say n
XK             % copy to clipboard K
:              % vector 1, 2, ... n
t!*            % generate table: duplicate, transpose and multiply with broadcasting
Y)             % linearize into column array
KYA            % paste n from clipboard K. Convert to that base
Z{             % cell array of rows from array
'(?<=^0*)0'    % string literal for regexp replacement: find leading zeros
32c            % space character (for regexp replacement)
YX             % regexp replacement
Zc             % join cell array of strings into single string   
32             % code for space character. Conversion to char happens automatically
h              % concatenate horizontally
K4*[]e!        % paste n and multiply by 4. Reshape into 2D char array with 4*n columns

Edit: Try it online!

To run in the online compiler (as of February 19, 2016), change Y) to X:, and remove []. This is to adapt to changes that have been made to the language since this challenge was posted.

Answer 4

Bash + BSD utilities, 36

echo Co{1..12}d{1..12}*p|dc|rs -j 12

Works out-of-the-box on OS X. rs may need to be installed on Linux systems.

• Bash expands Co{1..12}d{1..12}*p to Co1d1*p Co1d2*p Co1d3*p ... Co1d12*p ... Co12d12*p.
• This is a dc expression that generates the required terms. Co sets output base to 12. d is used as a separator between numbers instead of a space, so no escape is required in the brace expansion. d actually duplicates the top of stack, but this is effectively ignored and discarded.
• The output from dc is a single space-separated line. rs reshapes this to a 12x12 array. -j right-justifies each term.

Answer 5

Pyth, 36 bytes

Km+1dUJ12rjbmjkm.[\ 4j""m.Hbj*dkJKK1

Try it here.

Answer 6

Python, 153 147 132 bytes * 0.8 = 105.6

def p(b):
 f=lambda n:(n>=b and f(n/b)or'')+chr((48,55)[n%b>9]+n%b)
 for i in range(b*b):print'%4s\n'[:3+(~i%b<1)]%f(~(i%b)*~(i/b)),

Down to 132 bytes thanks to the advice of Tim Pederick! :)

Answer 7

CJam, 38 33 32 38 * (.8) = 30.4 bytes

qi:D,:):L{Lf*{Db{_9>{55+c}&}%4Se[}%N}%

Try it here.

(Looks pretty similar to Martin's now.)

qi:D,:):L          e# Generate list of [1...input]
{Lf*               e# Take each number in that list and multiply it by the same list ([[1,2,3,..,input][2,4,6,...,input],...})
{Db{_9>{55+c}&}%   e# Convert each product to base input. If a digit value is >= 10 add 55 and convert to char, to make it a letter.
4Se[}%N}%          e# Pad each number with spaces to length 4. Put a newline after each row.

Answer 8

Perl 6, 60 bytes -20% = 48 bytes

{.put for (1..$_ X*1..$_)».base($_)».fmt('%3s').rotor($_)} # 60-20% = 48
#          ^-----------^ produce a list of two cross multiplied lists
#                        ^--------^ convert each to base N
#          format each to 3 spaces ^----------^
#         split the list into N element chunks ^--------^
#^-------^ print each of those on their own line with spaces between elements

( This is almost exactly how I would write it even if I wasn't trying to get it as short as I could )

Usage:

{...}(2)
  1  10
 10 100

my &code = {...}
code 2;
  1  10
 10 100

{...}(12);
  1   2   3   4   5   6   7   8   9   A   B  10
  2   4   6   8   A  10  12  14  16  18  1A  20
  3   6   9  10  13  16  19  20  23  26  29  30
  4   8  10  14  18  20  24  28  30  34  38  40
  5   A  13  18  21  26  2B  34  39  42  47  50
  6  10  16  20  26  30  36  40  46  50  56  60
  7  12  19  24  2B  36  41  48  53  5A  65  70
  8  14  20  28  34  40  48  54  60  68  74  80
  9  16  23  30  39  46  53  60  69  76  83  90
  A  18  26  34  42  50  5A  68  76  84  92  A0
  B  1A  29  38  47  56  65  74  83  92  A1  B0
 10  20  30  40  50  60  70  80  90  A0  B0 100

{...}(18);
  1   2   3   4   5   6   7   8   9   A   B   C   D   E   F   G   H  10
  2   4   6   8   A   C   E   G  10  12  14  16  18  1A  1C  1E  1G  20
  3   6   9   C   F  10  13  16  19  1C  1F  20  23  26  29  2C  2F  30
  4   8   C   G  12  16  1A  1E  20  24  28  2C  2G  32  36  3A  3E  40
  5   A   F  12  17  1C  1H  24  29  2E  31  36  3B  3G  43  48  4D  50
  6   C  10  16  1C  20  26  2C  30  36  3C  40  46  4C  50  56  5C  60
  7   E  13  1A  1H  26  2D  32  39  3G  45  4C  51  58  5F  64  6B  70
  8   G  16  1E  24  2C  32  3A  40  48  4G  56  5E  64  6C  72  7A  80
  9  10  19  20  29  30  39  40  49  50  59  60  69  70  79  80  89  90
  A  12  1C  24  2E  36  3G  48  50  5A  62  6C  74  7E  86  8G  98  A0
  B  14  1F  28  31  3C  45  4G  59  62  6D  76  7H  8A  93  9E  A7  B0
  C  16  20  2C  36  40  4C  56  60  6C  76  80  8C  96  A0  AC  B6  C0
  D  18  23  2G  3B  46  51  5E  69  74  7H  8C  97  A2  AF  BA  C5  D0
  E  1A  26  32  3G  4C  58  64  70  7E  8A  96  A2  AG  BC  C8  D4  E0
  F  1C  29  36  43  50  5F  6C  79  86  93  A0  AF  BC  C9  D6  E3  F0
  G  1E  2C  3A  48  56  64  72  80  8G  9E  AC  BA  C8  D6  E4  F2  G0
  H  1G  2F  3E  4D  5C  6B  7A  89  98  A7  B6  C5  D4  E3  F2  G1  H0
 10  20  30  40  50  60  70  80  90  A0  B0  C0  D0  E0  F0  G0  H0 100

Answer 9

JavaScript (ES6) 84 (105-20%)

The obvious way, to begin with.

n=>{for(o=i=``;i++<n;o+=`
`)for(j=0;j++<n;)o+=(`   `+(i*j).toString(n)).slice(-4).toUpperCase();alert(o)}

Notes

• It's a pity js toString produce lowercase letters
• alert is not the best way to output the table, but it's the shorter, as there is an explicit request to "display on screen"
• Just returning the value would be a couple bytes shorter.

Less golfed

n=>{
  for(o='', i=0; i++<n; o+='\n')
    for(j=0;j++<n;)
       o+=('   '+(i*j).toString(n)).slice(-4).toUpperCase()
  alert(o)
}

Answer 10

Python 3, 126 - 20% = 100.8 bytes

The outer function, t, is the one that actually prints the multiplication table. The inner function, i, does the conversion of a number to a base from 2 to 36.

def t(b):
 i=lambda n:(n>=b and i(n//b)or'')+chr(n%b+[48,55][n%b>9]);R=range(b)
 for r in R:print(*('%3s'%i(~r*~c)for c in R))

Hat tip to Boomerang for their solution, and for a golfing tip. I avoided copying anything from Boomerang's solution, but I did allow myself glances at it to see where I could trim more out. And even before that, I found that the more I golfed it, the more mine started to look like Boomerang's!

Answer 11

Javascript (ES6) 96.8 93.6 Bytes (20% of 117)

n=>{b='';for(i=0;i++<n;b+=`\n`)for(j=0;j++<n;)a=(i*j).toString(n).toUpperCase(),b+=' '.repeat(4-a.length)+a;alert(b)}

Explanation

n=>
    {                                     
      b='';                                    //clear table var at each run
      for(i=0;i++<n;b+=`\n`)                   //iterate through rows
        for(j=0;j++<n;)                        //iterate through cols
          a=(i*j).toString(n).toUpperCase(),   //get desired number
          b+=' '.repeat(4-a.length)+a";        //pad to right
    alert(b)                                   //display result
}

-saved 4 bytes thanks to @edc65

Answer 12

MATLAB, 111*0.8=88.8 110*0.8=88 bytes

My debut here:

@(N)disp(reshape(strrep(strrep([' ',strjoin(cellstr(dec2base([1:N]'*[1:N],N)))],' 0','  '),' 0','  '),4*N,N)')

Explanation:

[1:N]'*[1:N] make multiplication table in base 10

dec2base([1:N]'*[1:N],N) convert to base 12. The output is char array with leading 0-s

strjoin(cellstr(dec2base(___))) convert to cell and back to char joining strings with space yielding 1x575 string

[' ',strjoin(___)] append space to have 576 elements

strrep(___,' 0',' ') remove one leading zero. We do it twice because we have strings with two leading zeros

reshape(___,4*N,N)' convert 1x576 char array into 48x12 char array

disp(___) display the result without ans =

Output:

 1   2   3   4   5   6   7   8   9   A   B  10
 2   4   6   8   A  10  12  14  16  18  1A  20
 3   6   9  10  13  16  19  20  23  26  29  30
 4   8  10  14  18  20  24  28  30  34  38  40
 5   A  13  18  21  26  2B  34  39  42  47  50
 6  10  16  20  26  30  36  40  46  50  56  60
 7  12  19  24  2B  36  41  48  53  5A  65  70
 8  14  20  28  34  40  48  54  60  68  74  80
 9  16  23  30  39  46  53  60  69  76  83  90
 A  18  26  34  42  50  5A  68  76  84  92  A0
 B  1A  29  38  47  56  65  74  83  92  A1  B0
10  20  30  40  50  60  70  80  90  A0  B0 100 

If we don't count statement N=12;, 5*.8=4 bytes are saved. Also, if ans = output is tolerated, then we can remove disp() saving another 6*0.8=4.8 bytes. Of course, there may be other ways to save bytes :)

Answer 13

Python 3: 166 161 152 - 20% = 121.6 bytes

I know it's inferior to the existing Python answers but I figured to give it a shot. It's my first time posting on this site…

def t(b):
 r=range(1,b+1);f=lambda x:x and f(x//b)+chr((55,48)[x%b>9]+x%b)or''
 print('\n'.join(''.join(B)for B in(('%4s'%f(i*j)for j in r)for i in r)))

Answer 14

APL, 32 31×0.8=24.8 bytes

{¯4↑¨⊃∘(⎕D,⎕A)¨¨⍵⊥⍣¯1¨∘.×⍨1+⍳⍵}

In origin 0. In English:

• ∘.×⍨1+⍳⍵: multiplication table
• ⍵⊥⍣¯1¨: express in base ⍵ each element of the multiplication table
• ⊃∘(⎕D,⎕A)¨¨: convert the table of vector of numbers into a table of vectors of chars
• ¯4↑¨: right align to length 4 each element of the result

The default APL print routine does the right thing.

      {¯4↑¨(⍵⊥⍣¯1¨∘.×⍨1+⍳⍵)⊃¨¨⊂⊂⎕D,⎕A}13
    1     2     3     4     5     6     7     8     9     A     B     C    10 
    2     4     6     8     A     C    11    13    15    17    19    1B    20 
    3     6     9     C    12    15    18    1B    21    24    27    2A    30 
    4     8     C    13    17    1B    22    26    2A    31    35    39    40 
    5     A    12    17    1C    24    29    31    36    3B    43    48    50 
    6     C    15    1B    24    2A    33    39    42    48    51    57    60 
    7    11    18    22    29    33    3A    44    4B    55    5C    66    70 
    8    13    1B    26    31    39    44    4C    57    62    6A    75    80 
    9    15    21    2A    36    42    4B    57    63    6C    78    84    90 
    A    17    24    31    3B    48    55    62    6C    79    86    93    A0 
    B    19    27    35    43    51    5C    6A    78    86    94    A2    B0 
    C    1B    2A    39    48    57    66    75    84    93    A2    B1    C0 
   10    20    30    40    50    60    70    80    90    A0    B0    C0   100 

Answer 15

Vyxal, 20 \$\times\$ 0.8 = 16 bytes

ɾ:v*$τkdkAJİṅ:fÞGL↳⁋

Try it Online!

This could actually be 9*0.8=7.2 bytes if Vyxal had a gridify builtin and a buitlin to convert to a base as a string (with letters).

Answer 16

Ruby, 69 66 characters - 20% = 52.8

->n{(r=1..n).map{|a|puts r.map{|b|"%4s"%(a*b).to_s(n).upcase}*''}}

Sample run:

2.1.5 :001 > ->n{(r=1..n).map{|a|puts r.map{|b|"%4s"%(a*b).to_s(n).upcase}*''}}[4]
   1   2   3  10
   2  10  12  20
   3  12  21  30
  10  20  30 100

Answer 17

ksh93, 51 * 0.8 == 40.8 bytes

eval echo "'
' {"{1..$1}'..$((++n*$1))..$n%3..$1d}'

This should work up to base 64 (the largest radix supported by ksh). Examples:

 $ n= ksh -s 12 <<\EOF
eval echo "'
' {"{1..$1}'..$((++n*$1))..$n%3..$1d}'
EOF


   1   2   3   4   5   6   7   8   9   a   b  10
   2   4   6   8   a  10  12  14  16  18  1a  20
   3   6   9  10  13  16  19  20  23  26  29  30
   4   8  10  14  18  20  24  28  30  34  38  40
   5   a  13  18  21  26  2b  34  39  42  47  50
   6  10  16  20  26  30  36  40  46  50  56  60
   7  12  19  24  2b  36  41  48  53  5a  65  70
   8  14  20  28  34  40  48  54  60  68  74  80
   9  16  23  30  39  46  53  60  69  76  83  90
   a  18  26  34  42  50  5a  68  76  84  92  a0
   b  1a  29  38  47  56  65  74  83  92  a1  b0
  10  20  30  40  50  60  70  80  90  a0  b0 100

 $ n= ksh -s 22 <<\EOF
eval echo "'
' {"{1..$1}'..$((++n*$1))..$n%3..$1d}'
EOF


   1   2   3   4   5   6   7   8   9   a   b   c   d   e   f   g   h   i   j   k   l  10
   2   4   6   8   a   c   e   g   i   k  10  12  14  16  18  1a  1c  1e  1g  1i  1k  20
   3   6   9   c   f   i   l  12  15  18  1b  1e  1h  1k  21  24  27  2a  2d  2g  2j  30
   4   8   c   g   k  12  16  1a  1e  1i  20  24  28  2c  2g  2k  32  36  3a  3e  3i  40
   5   a   f   k  13  18  1d  1i  21  26  2b  2g  2l  34  39  3e  3j  42  47  4c  4h  50
   6   c   i  12  18  1e  1k  24  2a  2g  30  36  3c  3i  42  48  4e  4k  54  5a  5g  60
   7   e   l  16  1d  1k  25  2c  2j  34  3b  3i  43  4a  4h  52  59  5g  61  68  6f  70
   8   g  12  1a  1i  24  2c  2k  36  3e  40  48  4g  52  5a  5i  64  6c  6k  76  7e  80
   9   i  15  1e  21  2a  2j  36  3f  42  4b  4k  57  5g  63  6c  6l  78  7h  84  8d  90
   a   k  18  1i  26  2g  34  3e  42  4c  50  5a  5k  68  6i  76  7g  84  8e  92  9c  a0
   b  10  1b  20  2b  30  3b  40  4b  50  5b  60  6b  70  7b  80  8b  90  9b  a0  ab  b0
   c  12  1e  24  2g  36  3i  48  4k  5a  60  6c  72  7e  84  8g  96  9i  a8  ak  ba  c0
   d  14  1h  28  2l  3c  43  4g  57  5k  6b  72  7f  86  8j  9a  a1  ae  b5  bi  c9  d0
   e  16  1k  2c  34  3i  4a  52  5g  68  70  7e  86  8k  9c  a4  ai  ba  c2  cg  d8  e0
   f  18  21  2g  39  42  4h  5a  63  6i  7b  84  8j  9c  a5  ak  bd  c6  cl  de  e7  f0
   g  1a  24  2k  3e  48  52  5i  6c  76  80  8g  9a  a4  ak  be  c8  d2  di  ec  f6  g0
   h  1c  27  32  3j  4e  59  64  6l  7g  8b  96  a1  ai  bd  c8  d3  dk  ef  fa  g5  h0
   i  1e  2a  36  42  4k  5g  6c  78  84  90  9i  ae  ba  c6  d2  dk  eg  fc  g8  h4  i0
   j  1g  2d  3a  47  54  61  6k  7h  8e  9b  a8  b5  c2  cl  di  ef  fc  g9  h6  i3  j0
   k  1i  2g  3e  4c  5a  68  76  84  92  a0  ak  bi  cg  de  ec  fa  g8  h6  i4  j2  k0
   l  1k  2j  3i  4h  5g  6f  7e  8d  9c  ab  ba  c9  d8  e7  f6  g5  h4  i3  j2  k1  l0
  10  20  30  40  50  60  70  80  90  a0  b0  c0  d0  e0  f0  g0  h0  i0  j0  k0  l0 100

Answer 18

Pyke, 14 bytes * 0.8 = 11.2 bytes, noncompetitive

QhD]UA*MbQMl2P

Try it here!

Explanation:

            - autoassign Q = eval_or_not_input()
QhD]        - [Q+1, Q+1]
    U       - nd_range(^)
     A*     - apply(*, ^)
       MbQ  - map(base(Q), ^)
          Ml2 - map(lower, ^)
          P - print_grid(^)

Or 12 bytes without the bonus

13D]UA*Mb12P