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Search: id:A004246
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| A004246 |
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Number of permutations of length n with spread 3. |
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+0
1
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| 8, 25, 144, 735, 4608, 39285, 362000, 3628185, 40808448, 478988081, 6227101888, 87248724750, 1300561920000, 20922788404479, 355587467242752, 6402373698206889, 121810906419200000
(list; graph; listen)
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OFFSET
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4,1
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REFERENCES
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Graham, R. L.; Lehmer, D. H. On the permanent of Schur's matrix. J. Austral. Math. Soc. Ser. A 21 (1976), no. 4, 487-497.
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LINKS
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Graham, R. L.; Lehmer, D. H., On the Permanent of Schur's Matrix, Jour. Australian Math. Soc. 21 (series A) (1976), 487-497.
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CROSSREFS
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Sequence in context: A068315 A069586 A042189 this_sequence A060718 A060743 A029617
Adjacent sequences: A004243 A004244 A004245 this_sequence A004247 A004248 A004249
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KEYWORD
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nonn
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AUTHOR
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njas
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EXTENSIONS
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More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 17 2007
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