A013042 - OEIS

%I #6 Feb 10 2025 18:49:16

%S 1,4,96,5664,622720,110002304,28499801088,10180961396480,

%T 4796029025538048,2880634827782397952,2148613628413055418368,

%U 1948442293941619438944256,2111126262325896262110150656

%N sec(sinh(x)+arcsin(x))=1+4/2!*x^2+96/4!*x^4+5664/6!*x^6+622720/8!*x^8...

%t With[{nn=30},Take[CoefficientList[Series[Sec[Sinh[x]+ArcSin[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Feb 10 2025 *)

%K nonn

%O 0,2

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