Return double factorial
n(n-2)...(5)(3)(1), n>0, odd
n!! = n(n-2)...(6)(4)(2), n>0, even
1 , n = -1, or n = 0
6!! = (6)(4)(2) = 48
Neither n = -1, nor n = 0 are tested.
We love vectorized solutions. Problem 1 : remove the row average.
Is the input divisible by 3?
Transpose of matrix
Number of Even Elements in Fibonacci Sequence
Dealing with correlation results!
Fill the Matrix - 2
Hexagonal numbers on a spiral matrix
Delete the rows in the middle
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