A013413 - OEIS

%I #6 Dec 20 2012 17:45:32

%S 1,0,0,90,-2520,368550,-29313900,7122965850,-1133998866000,

%T 432213196164750,-115564330313932500,64225795369647161250,

%U -25965004352151980115000,19884500689553832175593750

%N cosh(arcsin(x)-arctan(x))=1+90/6!*x^6-2520/8!*x^8+368550/10!*x^10...

%t With[{nn=30},Take[CoefficientList[Series[Cosh[ArcSin[x]-ArcTan[x]],{x,0,nn}],x]Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Dec 20 2012 *)

%K sign

%O 0,4

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