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%I #6 Aug 26 2020 14:48:02
%S 1,1,-3,69,-1159,115081,-3250827,1156388557,-12628752143,
%T 42394317198097,2830775181039853,4335882574518729045,
%U 967557162609958010985,1031578849176135526526105
%N cosh(arctan(arcsin(x)))=1+1/2!*x^2-3/4!*x^4+69/6!*x^6-1159/8!*x^8...
%t With[{nn=30},Take[CoefficientList[Series[Cosh[ArcTan[ArcSin[x]]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Aug 26 2020 *)
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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