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 A265833 #5 Dec 16 2015 05:57:47
%S A265833 1,0,2,0,4,0,8,7,16,14,32,28,76,56,201,112,402,241,804,566,1608,1475,
%T A265833 3238,2950,6739,5900,14066,11827,30533,24012,61066,49865,122164,
%U A265833 103846,245070,224499,494374,449035,1001635,898992,2032082,1805626,4181855,3640890
%N A265833 Expansion of Product_{k>=1} 1/(1 - (5*k-3)*x^(5*k-3)).
%H A265833 Vaclav Kotesovec, <a href="/A265833/b265833.txt">Table of n, a(n) for n = 0..5000</a>
%F A265833 a(n) ~ c * 2^(n/2), where
%F A265833 c = 2.083307142076305100818196347525098347528893162823662452462... if n is even,
%F A265833 c = 1.350596787589129261746699661559125050005090208149022621867... if n is odd.
%t A265833 nmax = 40; CoefficientList[Series[Product[1/(1 - (5*k-3)*x^(5*k-3)), {k, 1, nmax}], {x, 0, nmax}], x]
%Y A265833 Cf. A067553, A265820, A265821, A265828, A265829, A265830.
%Y A265833 Cf. A265831, A265832, A265834.
%K A265833 nonn
%O A265833 0,3
%A A265833 _Vaclav Kotesovec_, Dec 16 2015