A009054 Expansion of e.g.f. cos(sinh(sin(x))), even terms only.

1, -1, 1, 47, -895, 31, 1002497, -53580465, -8587007, 305732208959, -30437638147583, -144862063593105, 545283874522872193, -85823970766230251681, -801780964397998270975, 3637965188578615382687887

Offset

0,4

Links

G. C. Greubel, Table of n, a(n) for n = 0..250

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Cos[Sinh[Sin[x]]], {x, 0, nn}], x]Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Jun 06 2012 *)

Prog

(PARI) x='x+O('x^60); v=Vec(serlaplace(cos(sinh(sin(x))))); vector(#v\2, n, v[2*n-1]) \\ G. C. Greubel, Jul 23 2018

Crossrefs

Sequence in context: A101793 A262120 A032626 * A012018 A010963 A234354

Adjacent sequences: A009051 A009052 A009053 * A009055 A009056 A009057

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Definition clarified by Harvey P. Dale, Jun 06 2012

Status

approved