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 A100404 a(n) = L(n) * n! where L(n) are the Lucas numbers. 2
 2, 1, 6, 24, 168, 1320, 12960, 146160, 1895040, 27578880, 446342400, 7943443200, 154238515200, 3244277836800, 73491299481600, 1783667837952000, 46176597282816000, 1270159805730816000, 36992915271696384000, 1137260043722170368000, 36802508677688033280000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Table of n, a(n) for n=0..20. FORMULA E.g.f.: (2 - x) / (1 - x - x^2). - Ilya Gutkovskiy, Jun 07 2021 EXAMPLE If n=3, L(3) * 3! = 24. If n=4, L(4) * 4! = 168. MATHEMATICA Table[LucasL[n, 1]*n!, {n, 0, 20}] (* Zerinvary Lajos, Jul 09 2009 *) CROSSREFS Cf. A000032, A005443. Sequence in context: A239740 A268371 A318918 * A355005 A320570 A300911 Adjacent sequences: A100401 A100402 A100403 * A100405 A100406 A100407 KEYWORD nonn AUTHOR Parthasarathy Nambi, Jan 11 2005 EXTENSIONS Extended by Zerinvary Lajos, Jul 09 2009 Edited by R. J. Mathar, Jul 31 2009 STATUS approved

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Last modified October 4 22:11 EDT 2023. Contains 365888 sequences. (Running on oeis4.)