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A004204 Number of permutations of length n with spread 0.
(Formerly M3569)
1
1, 1, 0, 4, 20, 144, 630, 5696, 39366, 366400, 3634950, 39066624, 479163828, 6226534272, 87238701000, 1315130458112, 20922813624336, 355586138666496, 6402373841107998, 121479626301440000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

REFERENCES

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.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..20.

Graham, R. L.; Lehmer, D. H., On the Permanent of Schur's Matrix, Jour. Australian Math. Soc. 21 (series A) (1976), 487-497.

CROSSREFS

Sequence in context: A292932 A187116 A098541 * A160567 A034216 A144009

Adjacent sequences:  A004201 A004202 A004203 * A004205 A004206 A004207

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 17 2007

STATUS

approved

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Last modified December 14 12:28 EST 2018. Contains 318097 sequences. (Running on oeis4.)