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.
DNA N-Gram Distribution
Test for balanced parentheses
Return the first and last character of a string
Derivative of polynomial
Flip the bit
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Polite numbers. Politeness.
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Pancake sorting - minimum flips.
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