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 A293526 #14 Oct 15 2017 05:04:02
%S A293526 1,0,0,6,0,0,360,5040,0,60480,3628800,39916800,19958400,3113510400,
%T A293526 130767436800,1318571654400,3487131648000,355687428096000,
%U A293526 12813639597158400,126713646259200000,1013709170073600000,85161707377883136000,2819368492175499264000
%N A293526 E.g.f.: exp(x^3/(1 - x^4)).
%F A293526 E.g.f.: Product_{k>0} exp(x^(4*k-1)).
%F A293526 a(n) ~ exp(sqrt(n) - n - 1/4) * n^(n - 1/4) / 2. - _Vaclav Kotesovec_, Oct 15 2017
%o A293526 (PARI) N=66; x='x+O('x^N); Vec(serlaplace(exp(x^3/(1-x^4))))
%o A293526 (PARI) N=66; x='x+O('x^N); Vec(serlaplace(prod(k=1, N, exp(x^(4*k-1)))))
%Y A293526 E.g.f.: Product_{k>0} exp(x^(m*k-1)): A088009 (m=2), A293494 (m=3), this sequence (m=4).
%Y A293526 Cf. A293507.
%K A293526 nonn
%O A293526 0,4
%A A293526 _Seiichi Manyama_, Oct 11 2017