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] -> 
Add two numbers
Back to basics 7 - Equal NaNs
Is this matrix orthogonal?
Rounding off numbers to n decimals
Generalised Hamming Number
Longest Collatz Sequence
Sum of big primes without primes
BLOCK x3 (Version 4)
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