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 A009054 Expansion of e.g.f. cos(sinh(sin(x))), even terms only. 1

%I

%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 GĂ©rard_, Mar 15 1997

%E Definition clarified by _Harvey P. Dale_, Jun 06 2012

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Last modified April 19 20:04 EDT 2019. Contains 322291 sequences. (Running on oeis4.)