Replicate each element of a row vector (with NaN) a constant number of times.
n=2, A=[1 2 3] -> [1 1 2 2 3 3]
n=0, A=[2 1] -> 
Sum all integers from 1 to 2^n
Project Euler: Problem 10, Sum of Primes
Basics: 'Find the eigenvalues of given matrix
Generalised Hamming Number
Find indices of diagonal elements
Find my secret number
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