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A009038
Expansion of E.g.f. cos(sin(sinh(x))), even powers only.
1
1, -1, 1, 47, 1, -13409, 77441, 19836879, -535288319, -139742075329, -2263631905535, 1157041164813423, 85544399896958465, -10251042205544240161, -896378013566768664703, 524122354739233459190287
OFFSET
0,4
LINKS
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Cos[Sin[Sinh[x]]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Jul 31 2016 *)
PROG
(PARI) x='x+O('x^60); v=Vec(serlaplace(cos(sin(sinh(x))))); vector(#v\2, n, v[2*n-1]) \\ G. C. Greubel, Jul 22 2018
CROSSREFS
Sequence in context: A159446 A116328 A340550 * A051319 A065610 A320342
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Prior Mathematica program replaced by Harvey P. Dale, Jul 31 2016
STATUS
approved