A012247 - OEIS

%I #6 Dec 11 2012 14:36:11

%S 1,1,1,0,-3,-4,21,136,185,-7408,-67159,644416,11805621,-84562880,

%T -2380474563,15811723136,591392066161,-4005496370944,-181472052075695,

%U 1317763889887232,68002767860495981

%N exp(sinh(arctan(x)))=1+x+1/2!*x^2-3/4!*x^4-4/5!*x^5+21/6!*x^6...

%t With[{nn=20},CoefficientList[Series[Exp[Sinh[ArcTan[x]]],{x,0,nn}],x]Range[0,nn]!] (* _Harvey P. Dale_, Dec 11 2012 *)

%K sign

%O 0,5

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