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A129153 Rencontres numbers: permutations with exactly 8 fixed points. 0
1, 0, 45, 330, 4455, 56628, 795795, 11930490, 190900710, 3245287760, 58415223438, 1109889169740, 22197783520770, 466153453732680, 10255375982438730, 235873647595600476, 5660967542295146895, 141524188557377590800 (list; graph; refs; listen; history; internal format)
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 * A156719 A155015 A179795

Adjacent sequences:  A129150 A129151 A129152 * A129154 A129155 A129156

KEYWORD

nonn

AUTHOR

Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 25 2007

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Last modified February 15 21:27 EST 2012. Contains 205859 sequences.