A009047 Expansion of cos(sin(x)*cosh(x)), even terms only.

1, -1, -7, 23, 1297, -6129, -894903, 829671, 1879275169, 1886150559, -7580265762535, -85001467923145, 61409100961369265, 1056714909891968687, -781355567634874555799, -25440890573992236442361

Offset

0,3

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Cos[Sin[x]*Cosh[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Nov 12 2017 *)

Prog

(PARI) x='x+O('x^50); v=Vec(serlaplace(cos(sin(x)*cosh(x)))); vector(#v\2, n, v[2*n-1]) \\ G. C. Greubel, Jul 23 2018

Crossrefs

Sequence in context: A322557 A228699 A159485 * A129662 A012482 A124985

Adjacent sequences: A009044 A009045 A009046 * A009048 A009049 A009050

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Previous Mathematica program replaced by Harvey P. Dale, Nov 12 2017

Status

approved