Starting from 440Hz note (musical note A above middle C), create 13 notes, using twelve-tone equal temperament, in Herz units. https://en.wikipedia.org/wiki/Equal_temperament
Your output will be like [440, ... , 880] all rounded to integer.
Determine if a Given Number is a Triangle Number
Rotate a Matrix
The Answer to Life, the Universe, and Everything
Find the sum of n squares
Number of paths on a n-dimensional grid
Smallest n, for n! to have m trailing zero digits
Make a rainbow matrix (follow-up to checkerboard matrix)
Number of paths on a 3d grid
The number of trailing zero digit of a factorial
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