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cosh(arctan(x)+arcsin(x))=1+4/2!*x^2+8/4!*x^4+310/6!*x^6+4600/8!*x^8...
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%I #6 Jul 31 2021 20:04:29

%S 1,4,8,310,4600,695450,32209900,9441571750,1024927826000,

%T 439344864507250,96071120715212500,52160549887581638750,

%U 20873814687864446035000,13171711293701017616406250

%N cosh(arctan(x)+arcsin(x))=1+4/2!*x^2+8/4!*x^4+310/6!*x^6+4600/8!*x^8...

%t With[{nn=30},Take[CoefficientList[Series[Cosh[ArcTan[x]+ArcSin[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Jul 31 2021 *)

%K nonn

%O 0,2

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