A100404 - OEIS

%I #12 Jun 07 2021 04:51:28

%S 2,1,6,24,168,1320,12960,146160,1895040,27578880,446342400,7943443200,

%T 154238515200,3244277836800,73491299481600,1783667837952000,

%U 46176597282816000,1270159805730816000,36992915271696384000,1137260043722170368000,36802508677688033280000

%N a(n) = L(n) * n! where L(n) are the Lucas numbers.

%F E.g.f.: (2 - x) / (1 - x - x^2). - _Ilya Gutkovskiy_, Jun 07 2021

%e If n=3, L(3) * 3! = 24.

%e If n=4, L(4) * 4! = 168.

%t Table[LucasL[n, 1]*n!, {n, 0, 20}] (* _Zerinvary Lajos_, Jul 09 2009 *)

%Y Cf. A000032, A005443.

%K nonn

%O 0,1

%A _Parthasarathy Nambi_, Jan 11 2005

%E Extended by _Zerinvary Lajos_, Jul 09 2009

%E Edited by _R. J. Mathar_, Jul 31 2009