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 A268501 #5 Feb 06 2016 14:17:09
%S A268501 1,0,2,6,11,32,60,148,279,690,1312,2778,5684,11282,22920,44724,87919,
%T A268501 168978,329800,623086,1189794,2235744,4189442,7795642,14438670,
%U A268501 26577246,48616050,88724110,160629612,290267100,521225220,933031364,1661954928,2950946220
%N A268501 Expansion of Product_{k>=1} ((1 + k*x^k) / (1 + x^k))^k.
%H A268501 Vaclav Kotesovec, <a href="/A268501/b268501.txt">Table of n, a(n) for n = 0..5000</a>
%t A268501 nmax = 50; CoefficientList[Series[Product[((1+k*x^k)/(1+x^k))^k, {k, 1, nmax}], {x, 0, nmax}], x]
%Y A268501 Cf. A022629, A255528, A266891, A268500, A268502.
%K A268501 nonn
%O A268501 0,3
%A A268501 _Vaclav Kotesovec_, Feb 06 2016