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 A272602 #9 Jun 04 2016 06:50:17
%S A272602 1,1,2,4,10,26,316,1912,14204,83260,513496,2918576,43605112,442060984,
%T A272602 5396258960,51589877536,502620599056,4387660231952,77691034349344,
%U A272602 1065687761143360,17601265218632096,230878891157853856,3055183837594858432,35865234134641395584,155845649043266241280960
%N A272602 E.g.f.: exp( sum(n>=1, x^(n!) / n ) ).
%H A272602 Alois P. Heinz, <a href="/A272602/b272602.txt">Table of n, a(n) for n = 0..452</a>
%F A272602 E.g.f.: exp( sum(n>=1, x^(n!) / n ) ).
%o A272602 (PARI) N=66;x='x+O('x^N); Vec(serlaplace(exp(sum(n=1,10,x^(n!)/n))))
%Y A272602 Cf. A272603 (e.g.f.: exp( sum(n>=1, x^(n!) / n! ) ) ).
%K A272602 nonn
%O A272602 0,3
%A A272602 _Joerg Arndt_, May 29 2016