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 A009607 Expansion of e.g.f. sinh(tan(x))/cos(x), odd powers only. 1
 1, 6, 92, 2688, 127312, 8850336, 845380928, 105911556096, 16814357324032, 3294279618252288, 779927283014454272, 219346023009485242368, 72245888404549697916928, 27535159087648660044718080, 12019428370649765064698642432, 5955630440267924458161515003904 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS G. C. Greubel, Table of n, a(n) for n = 0..239 MATHEMATICA With[{nn = 50}, CoefficientList[Series[Sinh[Tan[x]]/Cos[x], {x, 0, nn}], x]*Range[0, nn - 1]!][[2 ;; ;; 2]] (* G. C. Greubel, Jan 30 2018 *) PROG (PARI) x='x+O('x^40); v=Vec(serlaplace(sinh(tan(x))/cos(x))); vector((#v-1)\2 , n, v[2*n-1]) \\ G. C. Greubel, Jan 30 2018 CROSSREFS Sequence in context: A278683 A280214 A113266 * A009684 A221080 A009527 Adjacent sequences: A009604 A009605 A009606 * A009608 A009609 A009610 KEYWORD nonn AUTHOR R. H. Hardin EXTENSIONS Extended and signs tested by Olivier Gérard, Mar 15 1997 STATUS approved

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Last modified May 29 00:29 EDT 2024. Contains 372921 sequences. (Running on oeis4.)