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A089066
Number of unique permutations of length n.
+0
2
1, 1, 1, 3, 8, 38, 192, 1320, 10176, 91296, 908160, 9985920, 119761920, 1556847360, 21794734080, 326920043520, 5230700052480, 88921882828800, 1600593472880640, 30411275613143040, 608225502973132800
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.
AT&T Labs Research
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