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 A332256 #8 Feb 08 2020 20:40:59
%S A332256 1,1,3,14,87,672,6231,67412,833475,11593140,179170947,3045978388,
%T A332256 56490392943,1134970258372,24557211519951,569294311105300,
%U A332256 14077429483372251,369861235318338404,10289111057247180411,302132879478864660340,9338874072977661538119
%N A332256 E.g.f.: 1 / (2 - exp(sinh(x))).
%F A332256 a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k) * A003724(k) * a(n-k).
%F A332256 a(n) ~ n! / (2 * sqrt(1 + log(2)^2) * (log(log(2) + sqrt(1 + log(2)^2)))^(n+1)). - _Vaclav Kotesovec_, Feb 08 2020
%t A332256 nmax = 20; CoefficientList[Series[1/(2 - Exp[Sinh[x]]), {x, 0, nmax}], x] Range[0, nmax]!
%o A332256 (PARI) seq(n)={Vec(serlaplace(1/(2 - exp(sinh(x + O(x*x^n))))))} \\ _Andrew Howroyd_, Feb 08 2020
%Y A332256 Cf. A000110, A000670, A003724, A006154, A053488, A083355.
%K A332256 nonn
%O A332256 0,3
%A A332256 _Ilya Gutkovskiy_, Feb 08 2020