id:A129153 - OEIS Search Results

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Rencontres numbers: permutations with exactly 8 fixed points.

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1, 0, 45, 330, 4455, 56628, 795795, 11930490, 190900710, 3245287760, 58415223438, 1109889169740, 22197783520770, 466153453732680, 10255375982438730, 235873647595600476, 5660967542295146895, 141524188557377590800 (list; graph; listen)

	OFFSET	`0,3`
	MAPLE	`a:=n->sum(n!*sum((-1)^k/(k-7)!, j=0..n), k=7..n): seq(-a(n)/8!, n=7..26);`
	CROSSREFS	`Sequence in context: A064561 A093761 A073873 this_sequence A155015 A036495 A053137` `Adjacent sequences: A129150 A129151 A129152 this_sequence A129154 A129155 A129156`
	KEYWORD	`nonn`
	AUTHOR	`Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 25 2007`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

AT&T Labs Research