cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A022611 Expansion of Product_{m>=1} (1+q^m)^(-16).

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%I A022611 #15 Apr 05 2017 09:50:34
%S A022611 1,-16,120,-576,2076,-6304,17344,-44416,106630,-242480,528608,
%T A022611 -1112128,2265656,-4486112,8666112,-16376192,30328593,-55145872,
%U A022611 98613424,-173670400,301550788,-516747872,874774016,-1464096000
%N A022611 Expansion of Product_{m>=1} (1+q^m)^(-16).
%H A022611 Seiichi Manyama, <a href="/A022611/b022611.txt">Table of n, a(n) for n = 0..1000</a>
%F A022611 a(n) ~ (-1)^n * exp(Pi*2 * sqrt(2*n/3)) / (2^(3/4) * 3^(1/4) * n^(3/4)). - _Vaclav Kotesovec_, Aug 27 2015
%F A022611 a(0) = 1, a(n) = -(16/n)*Sum_{k=1..n} A000593(k)*a(n-k) for n > 0. - _Seiichi Manyama_, Apr 05 2017
%t A022611 nmax = 50; CoefficientList[Series[Product[1/(1 + x^k)^16, {k, 1, nmax}], {x, 0, nmax}], x] (* _Vaclav Kotesovec_, Aug 27 2015 *)
%K A022611 sign,easy
%O A022611 0,2
%A A022611 _N. J. A. Sloane_