The test case result for n=5 seems a tad high.
Tim, that last case is altperm(altperm(5)). I did that to discourage lookup solutions.
Find the sum of all the numbers of the input vector
Getting the indices from a matrix
Unique values without using UNIQUE function
Even or Odd
Evaluate the zeta function for real arguments > 1
Find the nth Fibbinary number
Investigate the frequency of last digits of prime numbers
Evaluate the logarithmic integral
Count the ways to draw non-intersecting chords between points on a circle
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