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%I #6 Nov 16 2019 13:25:29
%S 1,-4,8,128,25216,-3387008,160621056,-6497102848,10675803193344,
%T -4485074198855680,823007646284349440,-188938583696417751040,
%U 280059136770757168726016,-235157137580491486235983872
%N arcsin(cos(x)*arctan(x))=x-4/3!*x^3+8/5!*x^5+128/7!*x^7+25216/9!*x^9...
%t With[{nn=30},Take[CoefficientList[Series[ArcSin[Cos[x]ArcTan[x]],{x,0,nn}],x] Range[0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Nov 16 2019 *)
%K sign
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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