A012994 cosh(arctan(x)+arcsin(x))=1+4/2!*x^2+8/4!*x^4+310/6!*x^6+4600/8!*x^8...

1, 4, 8, 310, 4600, 695450, 32209900, 9441571750, 1024927826000, 439344864507250, 96071120715212500, 52160549887581638750, 20873814687864446035000, 13171711293701017616406250

Offset

0,2

Links

Table of n, a(n) for n=0..13.

Mathematica

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 *)

Crossrefs

Sequence in context: A074073 A090653 A065022 * A136386 A260726 A308553

Adjacent sequences: A012991 A012992 A012993 * A012995 A012996 A012997

Keyword

nonn

Author

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

Status

approved