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 A009353 #13 Jun 22 2015 22:19:27
%S A009353 0,1,1,3,0,20,-85,637,-5096,46944,-484401,5544341,-69697672,954728788,
%T A009353 -14155260197,225856326165,-3858874322928,70293211672352,
%U A009353 -1359957800892673,27849583539856909,-601828107666316064
%N A009353 Expansion of log(1+sinh(x))*exp(x).
%F A009353 a(n) ~ (n-1)! * (-1)^(n+1) * (sqrt(2)-1) / (log(1+sqrt(2)))^n. - _Vaclav Kotesovec_, Jan 23 2015
%t A009353 Log[ 1+Sinh[ x ] ]*Exp[ x ]
%t A009353 CoefficientList[Series[E^x*Log[1 + Sinh[x]], {x, 0, 20}], x] * Range[0, 20]! (* _Vaclav Kotesovec_, Jan 23 2015 *)
%K A009353 sign,easy
%O A009353 0,4
%A A009353 _R. H. Hardin_
%E A009353 Extended with signs by _Olivier Gérard_, Mar 15 1997