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 A009359 #15 Aug 03 2021 11:20:33
%S A009359 0,2,-12,232,-9632,685472,-74545152,11496925312,-2386930307072,
%T A009359 641870470410752,-217026250235707392,90115671250751137792,
%U A009359 -45080591297894376538112,26741121618547455928082432
%N A009359 Expansion of log(1 + sinh(x)*sin(x)).
%t A009359 With[{nn=30},Take[CoefficientList[Series[Log[1+Sinh[x]*Sin[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Aug 03 2021 *)
%K A009359 sign
%O A009359 0,2
%A A009359 _R. H. Hardin_
%E A009359 Extended with signs by _Olivier Gérard_, Mar 15 1997
%E A009359 Previous Mathematica program replaced by _Harvey P. Dale_, Aug 03 2021