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Conor O'Brien
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Lamaro
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Given a number > 0, output the sum with all digits (1 .. n) concatenated and reversed and add them up. For example, with n = 6:

The numbers 1 to 6 concatenated:

123456

Reversed:

654321

Adding them up together will result in: 777777. Another example is n = 11:

1 2 3 4 5 6 7 8 9 10 11 > 1234567891011

and

11 10 9 8 7 6 5 4 3 2 1 > 1110987654321

Adding them up together will result in 2345555545332. This is also known as A078262.

Shortest code wins!

Given a number > 0, output the sum with all digits concatenated and reversed and add them up. For example, with n = 6:

The numbers 1 to 6 concatenated:

123456

Reversed:

654321

Adding them up together will result in: 777777. Another example is n = 11:

1 2 3 4 5 6 7 8 9 10 11 > 1234567891011

and

11 10 9 8 7 6 5 4 3 2 1 > 1110987654321

Adding them up together will result in 2345555545332. This is also known as A078262.

Shortest code wins!

Given a number > 0, output the sum with all digits (1 .. n) concatenated and reversed and add them up. For example, with n = 6:

The numbers 1 to 6 concatenated:

123456

Reversed:

654321

Adding them up together will result in: 777777. Another example is n = 11:

1 2 3 4 5 6 7 8 9 10 11 > 1234567891011

and

11 10 9 8 7 6 5 4 3 2 1 > 1110987654321

Adding them up together will result in 2345555545332. This is also known as A078262.

Shortest code wins!

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Lamaro
Lamaro
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Adding up the digits and the digits reversed

Given a number > 0, output the sum with all digits concatenated and reversed and add them up. For example, with n = 6:

The numbers 1 to 6 concatenated:

123456

Reversed:

654321

Adding them up together will result in: 777777. Another example is n = 11:

1 2 3 4 5 6 7 8 9 10 11 > 1234567891011

and

11 10 9 8 7 6 5 4 3 2 1 > 1110987654321

Adding them up together will result in 2345555545332. This is also known as A078262.

Shortest code wins!