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 A355215 #15 Jun 25 2022 07:13:26
%S A355215 1,1,3,20,260,6304,281096,23095768,3534364152,1022066008944,
%T A355215 566769639800624,610404514456781600,1289451019913455115232,
%U A355215 5380706591109919979010304,44564091018102742571511384320,734792950974385564221797653105152
%N A355215 E.g.f. A(x) satisfies A'(x) = 1 + A(-2 * log(1-x))/2.
%H A355215 Seiichi Manyama, <a href="/A355215/b355215.txt">Table of n, a(n) for n = 1..82</a>
%F A355215 a(1) = 1; a(n+1) = Sum_{k=1..n} 2^(k-1) * |Stirling1(n,k)| * a(k).
%o A355215 (PARI) a_vector(n) = my(v=vector(n)); v[1]=1; for(i=1, n-1, v[i+1]=sum(j=1, i, 2^(j-1)*abs(stirling(i, j, 1))*v[j])); v;
%Y A355215 Cf. A355121, A355209.
%K A355215 nonn
%O A355215 1,3
%A A355215 _Seiichi Manyama_, Jun 24 2022