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%I #6 Feb 10 2019 17:17:40
%S 1,0,-12,-168,8144,1384768,149032128,16299168896,2859883876608,
%T 1008997773326336,466978134769624064,228641400872390260736,
%U 120327829272472868704256,72933308761894955432460288
%N arctanh(cos(x)*arcsin(x))=x-12/5!*x^5-168/7!*x^7+8144/9!*x^9...
%t With[{nn=30},Take[CoefficientList[Series[ArcTanh[Cos[x]ArcSin[x]],{x,0,nn}],x] Range[0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Feb 10 2019 *)
%K sign
%O 0,3
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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