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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS G. C. Greubel, Table of n, a(n) for n = 0..250 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 Adjacent sequences:  A009035 A009036 A009037 * A009039 A009040 A009041 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

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Last modified December 5 03:59 EST 2021. Contains 349530 sequences. (Running on oeis4.)