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A154657 Number of permutations of length n within distance 8. 3
1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 2943360, 21898800, 152622000, 1017952680, 6623303544, 42700751022, 276054834902, 1805409270031, 12020754177001, 80930279045116, 548117873866228, 3720269813727312 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) equals the permanent of the n X n matrix with 1's along the central seventeen diagonals, and 0's everywhere else. - John M. Campbell, Jul 10 2011

LINKS

R. H. Hardin, Table of n, a(n) for n=1..177, Jul 11 2010

Torleiv Kløve, Spheres of Permutations under the Infinity Norm - Permutations with limited displacement, Reports in Informatics, Department of Informatics, University of Bergen, Norway, no. 376, November 2008.

CROSSREFS

Cf. A000045, A002524, A002526, A072856, A154654-A154656.

Sequence in context: A273696 A177280 A173849 * A179361 A179368 A267389

Adjacent sequences:  A154654 A154655 A154656 * A154658 A154659 A154660

KEYWORD

nonn

AUTHOR

Torleiv Kløve, Jan 13 2009

STATUS

approved

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Last modified November 19 07:16 EST 2017. Contains 294916 sequences.