id:A046662 - OEIS Search Results

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Sum of mistyped version of binomial coefficients.

+0
2

1, 2, 7, 52, 749, 17686, 614227, 29354312, 1844279257, 147273109354, 14561325802271, 1745720380045852, 2494611639720702917 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`Sum(n!k!/(n-k)!, k=0..n)` `E.g.f.: exp(x)F(x), with F(x) = sum(k>=0, k!x^k). - R. Stephan, Apr 02 2004` `a(n) = n^2a(n - 1) - n(n - 1)a(n - 2) + 1. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Jul 15 2004`
	CROSSREFS	`A003149.` `Adjacent sequences: A046659 A046660 A046661 this_sequence A046663 A046664 A046665` `Sequence in context: A058721 A086902 A138737 this_sequence A118191 A005588 A106898`
	KEYWORD	`nonn,easy`
	AUTHOR	`Len Smiley`

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Last modified October 16 16:43 EDT 2008. Contains 145098 sequences.