Need a better test suite to prevent cheesy solutions like this one. :-) Some N>10 values in there would help. N>50 would be even better.
Swap the first and last columns
Angle between Two Vectors
Right Triangle Side Lengths (Inspired by Project Euler Problem 39)
Integer Sequence - II : New Fibonacci
Number of paths on a 3d grid
Smallest n, for n! to have m trailing zero digits
Under the sea: Snell's law & total internal reflection
Equal temperament - musical notes and frequency
Number of paths on a n-dimensional grid
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