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.
Alphabetize by last name
How to subtract?
Check if number exists in vector
Volume of a Simplex
Convert given decimal number to binary number.
Get Next Combination
Digit concentration in Champernowne's constant
Happy Free Wednesday!
Fill the matrix - 1
Net Present Value of a Stream of Cash Flows
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