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%I #21 Jul 24 2018 03:11:12
%S 1,-1,1,47,-895,31,1002497,-53580465,-8587007,305732208959,
%T -30437638147583,-144862063593105,545283874522872193,
%U -85823970766230251681,-801780964397998270975,3637965188578615382687887
%N Expansion of e.g.f. cos(sinh(sin(x))), even terms only.
%H G. C. Greubel, <a href="/A009054/b009054.txt">Table of n, a(n) for n = 0..250</a>
%t With[{nn=30},Take[CoefficientList[Series[Cos[Sinh[Sin[x]]],{x,0,nn}], x]Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Jun 06 2012 *)
%o (PARI) x='x+O('x^60); v=Vec(serlaplace(cos(sinh(sin(x))))); vector(#v\2,n,v[2*n-1]) \\ _G. C. Greubel_, Jul 23 2018
%K sign
%O 0,4
%A _R. H. Hardin_
%E Extended with signs by _Olivier Gérard_, Mar 15 1997
%E Definition clarified by _Harvey P. Dale_, Jun 06 2012
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