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Search: id:A004204
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| A004204 |
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Number of permutations of length n with spread 0.
(Formerly M3569)
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+0
1
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| 1, 1, 0, 4, 20, 144, 630, 5696, 39366, 366400, 3634950, 39066624, 479163828, 6226534272, 87238701000, 1315130458112, 20922813624336, 355586138666496, 6402373841107998, 121479626301440000
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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: A129102 A129099 A098541 this_sequence A160567 A034216 A144009
Adjacent sequences: A004201 A004202 A004203 this_sequence A004205 A004206 A004207
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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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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