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exp(sinh(x)*arctan(x))=1+2/2!*x^2+8/4!*x^4+110/6!*x^6+520/8!*x^8...
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%I #6 May 07 2018 17:33:17

%S 1,2,8,110,520,80458,-4654604,820778478,-157200016272,41164154565906,

%T -13482969489167252,5454988601609663734,-2666562535164656750936,

%U 1549911678027846498248986,-1056435556882844258622185948,834565745980558555804948223614

%N exp(sinh(x)*arctan(x))=1+2/2!*x^2+8/4!*x^4+110/6!*x^6+520/8!*x^8...

%t With[{nn=40},Take[CoefficientList[Series[Exp[Sinh[x]ArcTan[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, May 07 2018 *)

%K sign

%O 0,2

%A Patrick Demichel (patrick.demichel(AT)hp.com)

%E More terms from _Harvey P. Dale_, May 07 2018