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 A256105 #6 Mar 14 2015 12:12:37
%S A256105 1,2,10,36,166,556,2724,9000,41542,153164,657644,2325816,11020508,
%T A256105 38006264,164662664,634362320,2695771462,9775537676,43527018396,
%U A256105 156855914904,687387270260,2605392165928,10799896586616,40214700074800,178809945153820,657023566793400
%N A256105 a(n) = [x^n] 2^(2*n) / Product_{k>=1} (1-x^k)^(2^(-k)).
%C A256105 Limit n->infinity a(n)^(1/n) = 4.
%H A256105 Vaclav Kotesovec, <a href="/A256105/b256105.txt">Table of n, a(n) for n = 0..500</a>
%H A256105 Vaclav Kotesovec, <a href="/A256105/a256105.jpg">Graph a(n)/4^n</a>
%t A256105 Table[2^(2*n) * SeriesCoefficient[Product[1/(1-x^k)^(2^(-k)),{k,1,n}],{x,0,n}], {n,0,30}]
%t A256105 Table[4^n * (CoefficientList[Series[Exp[Sum[x^k/(2*k*(1-x^k/2)),{k,1,n}]],{x,0,n}],x])[[n+1]],{n,0,30}] (* faster *)
%Y A256105 Cf. A034899, A144074.
%K A256105 nonn
%O A256105 0,2
%A A256105 _Vaclav Kotesovec_, Mar 14 2015