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.

A303445 Expansion of Product_{k>=1} ((1 + (8^k*x)^k)/(1 - (8^k*x)^k))^(1/8^k).

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%I A303445 #11 Apr 25 2018 05:58:06
%S A303445 1,2,130,524588,137440010582,2305843284159782076,
%T A303445 2475880083182464573602036628,170141183465420992188660515119769982616,
%U A303445 748288838313762576487529438443476930331940262147046
%N A303445 Expansion of Product_{k>=1} ((1 + (8^k*x)^k)/(1 - (8^k*x)^k))^(1/8^k).
%H A303445 Seiichi Manyama, <a href="/A303445/b303445.txt">Table of n, a(n) for n = 0..33</a>
%F A303445 a(n) ~ 2^(3*n^2 - 3*n + 1). - _Vaclav Kotesovec_, Apr 25 2018
%o A303445 (PARI) N=20; x='x+O('x^N); Vec(prod(k=1, N, ((1+(8^k*x)^k)/(1-(8^k*x)^k))^(1/8^k)))
%Y A303445 Cf. A303440, A303444.
%K A303445 nonn
%O A303445 0,2
%A A303445 _Seiichi Manyama_, Apr 24 2018