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 A009047 Expansion of cos(sin(x)*cosh(x)), even terms only. 1
 1, -1, -7, 23, 1297, -6129, -894903, 829671, 1879275169, 1886150559, -7580265762535, -85001467923145, 61409100961369265, 1056714909891968687, -781355567634874555799, -25440890573992236442361 (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[{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

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Last modified November 29 03:03 EST 2023. Contains 367422 sequences. (Running on oeis4.)