%I #6 Dec 09 2012 17:02:03
%S 2,-17,617,-48975,6737777,-1421214615,425703805529,-171743951533455,
%T 89764180627128673,-58996320723281672103,47619994236282288610313,
%U -46308836140187913937129823,53400247746119449830219271633
%N tanh(sinh(x)+arctan(x))=2*x-17/3!*x^3+617/5!*x^5-48975/7!*x^7...
%t With[{nn=30},Take[CoefficientList[Series[Tanh[Sinh[x]+ArcTan[x]],{x,0,nn}],x]Range[0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Dec 09 2012 *)
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)