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 A009202 #14 Jul 30 2025 17:14:06
%S A009202 1,1,1,1,1,-7,-47,-223,-895,-2959,-31,82721,1002497,8156073,53580465,
%T A009202 239061825,-8587007,-19348243487,-305732208959,-3454706477375,
%U A009202 -30437638147583,-182295608480935,144862063593105,26905043182243041
%N A009202 Expansion of e.g.f.: exp(sin(sinh(x))).
%t A009202 With[{nn=30},CoefficientList[Series[Exp[Sin[Sinh[x]]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Jul 30 2025 *)
%K A009202 sign,easy
%O A009202 0,6
%A A009202 _R. H. Hardin_
%E A009202 Extended with signs by _Olivier Gérard_, Mar 15 1997
%E A009202 Definition clarified and previous Mathematica program replaced by _Harvey P. Dale_, Jul 30 2025