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 A013468 #9 Mar 11 2019 11:57:57
%S A013468 1,-1,-1,4,5,-32,-55,390,961,-6432,-22463,134550,649761,-3443208,
%T A013468 -22456551,105379838,911433121,-3787776224,-42942180863,157078439014,
%U A013468 2324211078513,-7384507525560,-143088139308519
%N A013468 Expansion of e.g.f.: exp(cos(x)-exp(x))=1-x-1/2!*x^2+4/3!*x^3+5/4!*x^4-32/5!*x^5...
%t A013468 With[{nn=30},CoefficientList[Series[Exp[Cos[x]-Exp[x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Mar 11 2019 *)
%K A013468 sign
%O A013468 0,4
%A A013468 Patrick Demichel (patrick.demichel(AT)hp.com)
%E A013468 Definition clarified by _Harvey P. Dale_, Mar 11 2019