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A009037 Expansion of E.g.f. cos(sin(sin(x))), even powers only. 1
1, -1, 9, -153, 4273, -177489, 10342137, -800697641, 78896218081, -9587206592289, 1403875965476969, -243412313149166137, 49273184499900888465, -11506634193913551650161, 3067851166645384439929945 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

MATHEMATICA

With[{nmax = 60}, CoefficientList[Series[Cos[Sin[Sin[x]]], {x, 0, nmax}], x]*Range[0, nmax]!][[1 ;; -1 ;; 2]] (* G. C. Greubel, Jul 22 2018 *)

PROG

(PARI) x='x+O('x^60); v=Vec(serlaplace(cos(sin(sin(x))))); vector(#v\2, n, v[2*n-1]) \\ G. C. Greubel, Jul 22 2018

CROSSREFS

Sequence in context: A217823 A113391 A045755 * A012148 A193540 A193543

Adjacent sequences:  A009034 A009035 A009036 * A009038 A009039 A009040

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

STATUS

approved

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Last modified September 16 02:16 EDT 2019. Contains 327088 sequences. (Running on oeis4.)