Your statement is just as senseless as your exercise, which is unsurprising. Where are the arguments? Here are mine: you found the formula, you rewrote the formula, done. You don't even need to know syntax for this; for the sake of experiment, I solved this kata in C++ and C# (had issues with C for understandable reasons) despite knowing next to nothing about these languages. Why? Because all that's needed for this kata is the mathematical formula and the syntax of the ternary operator.

this is the dumbest thing i've heard all day, you clearly don't know what programming is all about.

1. Read about arithmetic series formula
2. Use floor division in this formula

Just another pointless math kata, has nothing to do with programming

I think this is more of a Math kata than a programming kata, especially since iterative solutions are blocked out.

it's better if you add the wiki page of
Centered pentagonal number

mmm i love the smell of floating point error in the morning

_{Edit: no one will notice i just realized that this is my 1200th kata an hour after
writing this comment lol}

FIRSTLY, I believe that you should not say "AROUND" the center dot," but "all dots" together with the center dot
SECONDLY, You request to output all columns + res, but in fact the id column is not needed.

C translation tests for values outside range of input type in intermediate steps of calculation.
This makes this 7 Kyu kata needlessly complicated. Please restrict these values.

Approved!

SQL Translation

cool

but next time, when providing code snippets, use the spoiler flag, so the kata is not spoiled of other users

i've marked both your comments with the spoiler flag

your solution isn't wrong per se, the return type of big numbers is in scientific notation

this can help you

Thanks!