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 A009268 #21 Feb 25 2018 18:12:23
%S A009268 1,1,3,8,25,92,369,1626,8033,42312,230081,1354190,8806769,59072860,
%T A009268 398252833,2892141666,22862362049,182200364944,1492258801793,
%U A009268 13163090657814,111357664397265,938233188787748,11338336523834337
%N A009268 Expansion of e.g.f. exp(tanh(x)*exp(x)).
%H A009268 Andrew Howroyd, <a href="/A009268/b009268.txt">Table of n, a(n) for n = 0..200</a>
%t A009268 With[{nn=30},CoefficientList[Series[Exp[Tanh[x]Exp[x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, May 31 2012 *)
%o A009268 (PARI) seq(n)={my(x='x+O('x^n)); Vec(serlaplace(exp(tanh(x)*exp(x))))} \\ _Andrew Howroyd_, Feb 25 2018
%K A009268 sign,easy
%O A009268 0,3
%A A009268 _R. H. Hardin_
%E A009268 Extended with signs by _Olivier Gérard_, Mar 15 1997