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%I #6 Jan 01 2020 12:44:07
%S 2,-16,440,-25856,2460448,-335955200,62060029824,-14940576792576,
%T 4555904588849664,-1719063029232504832,787080093043649165312,
%U -430107147338505961406464,276606088476056370612084736
%N sinh(tanh(x)*arctan(x))=2/2!*x^2-16/4!*x^4+440/6!*x^6-25856/8!*x^8...
%t With[{nn=30},Take[CoefficientList[Series[Sinh[Tanh[x]ArcTan[x]],{x,0,nn}],x] Range[0,nn]!,{3,-1,2}]] (* _Harvey P. Dale_, Jan 01 2020 *)
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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