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%I #7 Nov 28 2016 18:38:19
%S 0,2,-12,430,-27384,3086458,-524689220,126513823462,-40981407368048,
%T 17181884789561202,-9052122654113318396,5854705311144202022046,
%U -4561027328402726456335720,4212695076131749316430016746
%N arctanh(arctan(x)*sin(x))=2/2!*x^2-12/4!*x^4+430/6!*x^6-27384/8!*x^8...
%t With[{nn=30},Take[CoefficientList[Series[ArcTanh[ArcTan[x]*Sin[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Ray Chandler_, Nov 28 2016 *)
%K sign
%O 0,2
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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