A088182 E.g.f.: 1/(1-sinh(x)-x-x^2/2).

2, 9, 61, 550, 6201, 83894, 1324177, 23886552, 484745029, 10930266652, 271107065043, 7335664739264, 215030576905171, 6788059632853620, 229590704738375917, 8283076586956304128, 317510426598228001881

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Formula

a(n) ~ n!/((cosh(r)+1+r)*r^(n+1)), where r = 0.4434887492889753... is the root of the equation r*(2+r)+2*sinh(r)=2. - Vaclav Kotesovec, Jun 27 2013

Mathematica

With[{nn=20}, Rest[CoefficientList[Series[1/(1-Sinh[x]-x-x^2/2), {x, 0, nn}], x]Range[0, nn]!]] (* Harvey P. Dale, May 21 2012 *)

Crossrefs

Cf. A006154, A088181.

Sequence in context: A370161 A192939 A107883 * A006155 A121870 A268450

Adjacent sequences: A088179 A088180 A088181 * A088183 A088184 A088185

Keyword

nonn

Author

Karol A. Penson, Sep 22 2003

Status

approved