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.
%I A265828 #6 Dec 16 2015 05:54:29
%S A265828 1,0,0,3,0,0,9,7,0,27,21,11,81,63,82,258,189,246,851,586,738,2896,
%T A265828 1984,2237,8688,6491,7009,26091,21874,22609,78868,65653,71600,240021,
%U A265828 197686,231642,731137,599038,696146,2219861,1821033,2098301,6778660,5540660
%N A265828 Expansion of Product_{k>=1} 1/(1 - (4*k-1)*x^(4*k-1)).
%H A265828 Vaclav Kotesovec, <a href="/A265828/b265828.txt">Table of n, a(n) for n = 0..5000</a>
%F A265828 a(n) ~ c * 3^(n/3), where
%F A265828 c = 1.440862416741436228307395343405986172843082997125243989739... if mod(n,3) = 0
%F A265828 c = 0.839303125100473007517704405672941818726137049977537857220... if mod(n,3) = 1
%F A265828 c = 0.669924376359406710094617326814984989681716404092521759237... if mod(n,3) = 2.
%t A265828 nmax = 40; CoefficientList[Series[Product[1/(1 - (4*k-1)*x^(4*k-1)), {k, 1, nmax}], {x, 0, nmax}], x]
%Y A265828 Cf. A067553, A265820, A265821, A265829, A265830.
%K A265828 nonn
%O A265828 0,4
%A A265828 _Vaclav Kotesovec_, Dec 16 2015