Numerator of Sum_{k=1..n} 1/2^((k^2 + 3*k)/2).

A178185

Numerator of Sum_{k=1..n} 1/2^((k^2 + 3*k)/2).

Terms

    a(0) =1a(1) =9a(2) =145a(3) =4641a(4) =297025a(5) =38019201a(6) =9732915457

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