A012793 - OEIS

%I #6 Mar 16 2013 09:44:25

%S 1,1,21,885,67753,8319945,1497879933,371676224829,121584750716497,

%T 50703653565909009,26255891609845966565,16529283187035337691269,

%U 12432784542297124704745209,11011634249882125250110463705

%N sec(sec(x)*arcsin(x))=1+1/2!*x^2+21/4!*x^4+885/6!*x^6+67753/8!*x^8...

%t With[{nn=30},Take[CoefficientList[Series[Sec[Sec[x]ArcSin[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Mar 16 2013 *)

%K nonn

%O 0,3

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