A009063 Expansion of e.g.f. cos(sinh(x)*sin(x)) in powers of x^4.

1, -12, 2128, -1586112, 3134810368, -13146370501632, 101503034352652288, -1310949029247657295872, 26429820982888342672703488, -788858770066309331711165202432, 33443475995623429145380539537031168

Offset

0,2

Links

G. C. Greubel, Table of n, a(n) for n = 0..141

Mathematica

With[{nmax = 120}, CoefficientList[Series[Cos[Sinh[x]*Sin[x]], {x, 0, nmax}], x]*Range[0, nmax]!][[1 ;; ;; 4]] (* G. C. Greubel, Jul 24 2018 *)

Prog

(PARI) x='x+O('x^50); v=Vec(serlaplace(cos(sinh(x)*sin(x)))); vector(#v\4, n, v[4*n-3]) \\ G. C. Greubel, Jul 24 2018

Crossrefs

Sequence in context: A369336 A004823 A342964 * A012675 A175014 A101812

Adjacent sequences: A009060 A009061 A009062 * A009064 A009065 A009066

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved