a(1) = 0
a(2) = 1
a(2*N) = sqrt(a(2*N-1)*a(2*N+1))
a(2*N+1) = (a(2*N)+a(2*N+2))/2
given n return a(n)
The two recursion equations are mixed up.
Sort numbers by outside digits
Without the French accent please!
Permute diagonal and antidiagonal
Sum the entries of each column of a matrix which satisfy a logical condition.
Polite numbers. Politeness.
Pernicious Anniversary Problem
expand intervals vol.2
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