Malbolge Unshackled (20-trit rotation variant), 2,5254e7 bytes or 1,9809e7 bytes
Size of this answer exceeds maximum postable program size (eh), so the code is located in my GitHub repository (note: Don't copy the code using CTRL+A and CTRL+C, just rightclick and click "Save destination element as...").
How to run this?
This might be a tricky part, because naive Haskell interpreter will take ages upon ages to run this. TIO has decent Malbogle Unshackled interpreter, but sadly I won't be able to use it (limitations).
The best one I could find is the fixed 20-trit rotation width variant, that performs very well.
To make the interpreter a bit faster, I've removed all the checks from Matthias Lutter's Malbolge Unshackled interpreter.
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
const char* translation = "5z]&gqtyfr$(we4{WP)H-Zn,[%\\3dL+Q;>U!pJS72Fh"
"OA1CB6v^=I_0/8|jsb9m<.TVac`uY*MK'X~xDl}REokN:#?G\"i@";
typedef struct Word {
unsigned int area;
unsigned int high;
unsigned int low;
} Word;
void word2string(Word w, char* s, int min_length) {
if (!s) return;
if (min_length < 1) min_length = 1;
if (min_length > 20) min_length = 20;
s[0] = (w.area%3) + '0';
s[1] = 't';
char tmp[20];
int i;
for (i=0;i<10;i++) {
tmp[19-i] = (w.low % 3) + '0';
w.low /= 3;
}
for (i=0;i<10;i++) {
tmp[9-i] = (w.high % 3) + '0';
w.high /= 3;
}
i = 0;
while (tmp[i] == s[0] && i < 20 - min_length) i++;
int j = 2;
while (i < 20) {
s[j] = tmp[i];
i++;
j++;
}
s[j] = 0;
}
unsigned int crazy_low(unsigned int a, unsigned int d){
unsigned int crz[] = {1,0,0,1,0,2,2,2,1};
int position = 0;
unsigned int output = 0;
while (position < 10){
unsigned int i = a%3;
unsigned int j = d%3;
unsigned int out = crz[i+3*j];
unsigned int multiple = 1;
int k;
for (k=0;k<position;k++)
multiple *= 3;
output += multiple*out;
a /= 3;
d /= 3;
position++;
}
return output;
}
Word zero() {
Word result = {0, 0, 0};
return result;
}
Word increment(Word d) {
d.low++;
if (d.low >= 59049) {
d.low = 0;
d.high++;
if (d.high >= 59049) {
fprintf(stderr,"error: overflow\n");
exit(1);
}
}
return d;
}
Word decrement(Word d) {
if (d.low == 0) {
d.low = 59048;
d.high--;
}else{
d.low--;
}
return d;
}
Word crazy(Word a, Word d){
Word output;
unsigned int crz[] = {1,0,0,1,0,2,2,2,1};
output.area = crz[a.area+3*d.area];
output.high = crazy_low(a.high, d.high);
output.low = crazy_low(a.low, d.low);
return output;
}
Word rotate_r(Word d){
unsigned int carry_h = d.high%3;
unsigned int carry_l = d.low%3;
d.high = 19683 * carry_l + d.high / 3;
d.low = 19683 * carry_h + d.low / 3;
return d;
}
// last_initialized: if set, use to fill newly generated memory with preinitial values...
Word* ptr_to(Word** mem[], Word d, unsigned int last_initialized) {
if ((mem[d.area])[d.high]) {
return &(((mem[d.area])[d.high])[d.low]);
}
(mem[d.area])[d.high] = (Word*)malloc(59049 * sizeof(Word));
if (!(mem[d.area])[d.high]) {
fprintf(stderr,"error: out of memory.\n");
exit(1);
}
if (last_initialized) {
Word repitition[6];
repitition[(last_initialized-1) % 6] =
((mem[0])[(last_initialized-1) / 59049])
[(last_initialized-1) % 59049];
repitition[(last_initialized) % 6] =
((mem[0])[last_initialized / 59049])
[last_initialized % 59049];
unsigned int i;
for (i=0;i<6;i++) {
repitition[(last_initialized+1+i) % 6] =
crazy(repitition[(last_initialized+i) % 6],
repitition[(last_initialized-1+i) % 6]);
}
unsigned int offset = (59049*d.high) % 6;
i = 0;
while (1){
((mem[d.area])[d.high])[i] = repitition[(i+offset)%6];
if (i == 59048) {
break;
}
i++;
}
}
return &(((mem[d.area])[d.high])[d.low]);
}
unsigned int get_instruction(Word** mem[], Word c,
unsigned int last_initialized,
int ignore_invalid) {
Word* instr = ptr_to(mem, c, last_initialized);
unsigned int instruction = instr->low;
instruction = (instruction+c.low + 59049 * c.high
+ (c.area==1?52:(c.area==2?10:0)))%94;
return instruction;
}
int main(int argc, char* argv[]) {
Word** memory[3];
int i,j;
for (i=0; i<3; i++) {
memory[i] = (Word**)malloc(59049 * sizeof(Word*));
if (!memory) {
fprintf(stderr,"not enough memory.\n");
return 1;
}
for (j=0; j<59049; j++) {
(memory[i])[j] = 0;
}
}
Word a, c, d;
unsigned int result;
FILE* file;
if (argc < 2) {
// read program code from STDIN
file = stdin;
}else{
file = fopen(argv[1],"rb");
}
if (file == NULL) {
fprintf(stderr, "File not found: %s\n",argv[1]);
return 1;
}
a = zero();
c = zero();
d = zero();
result = 0;
while (!feof(file)){
unsigned int instr;
Word* cell = ptr_to(memory, d, 0);
(*cell) = zero();
result = fread(&cell->low,1,1,file);
if (result > 1)
return 1;
if (result == 0 || cell->low == 0x1a || cell->low == 0x04)
break;
instr = (cell->low + d.low + 59049*d.high)%94;
if (cell->low == ' ' || cell->low == '\t' || cell->low == '\r'
|| cell->low == '\n');
else if (cell->low >= 33 && cell->low < 127 &&
(instr == 4 || instr == 5 || instr == 23 || instr == 39
|| instr == 40 || instr == 62 || instr == 68
|| instr == 81)) {
d = increment(d);
}
}
if (file != stdin) {
fclose(file);
}
unsigned int last_initialized = 0;
while (1){
*ptr_to(memory, d, 0) = crazy(*ptr_to(memory, decrement(d), 0),
*ptr_to(memory, decrement(decrement(d)), 0));
last_initialized = d.low + 59049*d.high;
if (d.low == 59048) {
break;
}
d = increment(d);
}
d = zero();
unsigned int step = 0;
while (1) {
unsigned int instruction = get_instruction(memory, c,
last_initialized, 0);
step++;
switch (instruction){
case 4:
c = *ptr_to(memory,d,last_initialized);
break;
case 5:
if (!a.area) {
printf("%c",(char)(a.low + 59049*a.high));
}else if (a.area == 2 && a.low == 59047
&& a.high == 59048) {
printf("\n");
}
break;
case 23:
a = zero();
a.low = getchar();
if (a.low == EOF) {
a.low = 59048;
a.high = 59048;
a.area = 2;
}else if (a.low == '\n'){
a.low = 59047;
a.high = 59048;
a.area = 2;
}
break;
case 39:
a = (*ptr_to(memory,d,last_initialized)
= rotate_r(*ptr_to(memory,d,last_initialized)));
break;
case 40:
d = *ptr_to(memory,d,last_initialized);
break;
case 62:
a = (*ptr_to(memory,d,last_initialized)
= crazy(a, *ptr_to(memory,d,last_initialized)));
break;
case 81:
return 0;
case 68:
default:
break;
}
Word* mem_c = ptr_to(memory, c, last_initialized);
mem_c->low = translation[mem_c->low - 33];
c = increment(c);
d = increment(d);
}
return 0;
}
Performance notes
The application ran about 40 minutes on my machine, producing HEX numbers of the sequence. I stopped it around an hour of calculations, and it finished on 0x11.
Note this answer differs from my other one, because this one actually calculates the numbers, and it can be made so it calculates them indefinitely.
The application allocates the spinup buffer, that is around 7 gigabytes big, so better prepare your free RAM.
Alternative variant
Alternative variant uses around 2 gigabytes of memory less, but produces the output in form of ASCII characters (0 = ASCII(0x0), 10 = newline, etc...), and is available here. It doesn't compete though, due to challenge requirements
