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%I #6 Aug 02 2015 19:01:49
%S 2,-12,478,-30072,3540762,-612942660,152039588790,-50468748044400,
%T 21718174357721010,-11738352932289531900,7790876172172937111310,
%U -6228079669260433576829160,5903220687917269513392843210
%N arctanh(arcsinh(x)*arctan(x))=2/2!*x^2-12/4!*x^4+478/6!*x^6-30072/8!*x^8...
%t With[{nn=30},Take[CoefficientList[Series[ArcTanh[ArcSinh[x]ArcTan[x]],{x,0,nn}],x] Range[0,nn]!,{3,-1,2}]] (* _Harvey P. Dale_, Aug 02 2015 *)
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E Definition clarified by _Harvey P. Dale_, Aug 02 2015
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