Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #12 Sep 26 2016 11:38:18
%S 0,1,2,3,20,157,902,6895,77352,837145,9239882,124480059,1864519868,
%T 28461793141,470175087566,8596601614567,165789417707088,
%U 3347308657310641,72262366126097810,1655981959056540147,39676337445225379172,996780437366905850317
%N Expansion of e.g.f.: tan(tanh(x)*exp(x)).
%t With[{nn=20},CoefficientList[Series[Tan[Tanh[x]*Exp[x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Sep 17 2016 *)
%K nonn,easy
%O 0,3
%A _R. H. Hardin_
%E Extended and signs tested Mar 15 1997 by _Olivier Gérard_.
%E Definition clarified and prior Mathematica program replaced by _Harvey P. Dale_, Sep 17 2016