id:A083411 - OEIS Search Results

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a(n) = Sum(((k-1)/2)*k!*Stirling_2(n,k),k=1..n).

+0
2

0, 1, 9, 79, 765, 8311, 100989, 1362439, 20246445, 328972471, 5805917469, 110645911399, 2265191981325, 49589790516631, 1156201277261949, 28605950745797959, 748605590542359405, 20661245832389468791, 599820758571599742429, 18272940402442730318119, 582867486201919540724685 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`E.g.f.: (1/2)*( (1-exp(x))/(2-exp(x)) )^2.`
	CROSSREFS	`Equals A083384(n)/n.` `Sequence in context: A125909 A125421 A163445 this_sequence A081108 A018913 A127265` `Adjacent sequences: A083408 A083409 A083410 this_sequence A083412 A083413 A083414`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jun 08 2003`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research