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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
OFFSET
0,3
LINKS
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: A361190 A113391 A045755 * A012148 A193540 A193543
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved