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 A265829 #5 Dec 16 2015 05:54:51
%S A265829 1,0,2,0,4,0,14,0,28,0,66,0,168,0,350,0,760,0,1754,0,3692,0,7766,0,
%T A265829 17076,0,35282,0,73232,0,156758,0,320768,0,658978,0,1380612,0,2808534,
%U A265829 0,5732780,0,11849002,0,23997576,0,48701918,0,99744056,0,201405042
%N A265829 Expansion of Product_{k>=1} 1/(1 - (4*k-2)*x^(4*k-2)).
%H A265829 Vaclav Kotesovec, <a href="/A265829/b265829.txt">Table of n, a(n) for n = 0..5000</a>
%F A265829 If n is even, then a(n) ~ c * 2^(n/2), where c = 6.8748052998532604456256851165148110527112306899116599334584... .
%t A265829 nmax = 40; CoefficientList[Series[Product[1/(1 - (4*k-2)*x^(4*k-2)), {k, 1, nmax}], {x, 0, nmax}], x]
%Y A265829 Cf. A067553, A265820, A265821, A265828, A265830.
%K A265829 nonn
%O A265829 0,3
%A A265829 _Vaclav Kotesovec_, Dec 16 2015