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%I #7 Nov 21 2013 12:46:00
%S 1,-1,9,-201,8753,-634481,69292281,-10655767929,2197620415201,
%T -585914236294753,196238045270790761,-80691386297887323561,
%U 39976011626025680236049,-23490521419525456192130001
%N cos(sin(arcsinh(x)))=1-1/2!*x^2+9/4!*x^4-201/6!*x^6+8753/8!*x^8...
%t With[{nn=30},Take[CoefficientList[Series[Cos[Sin[ArcSinh[x]]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Feb 16 2012 *)
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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