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A154656
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Number of permutations of length n within distance 7
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3
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1, 2, 6, 24, 120, 720, 5040, 40320, 287280, 1865520, 11345160, 66349464, 381523758, 2193664790, 12764590275, 75796724309, 455383613924, 2750869551868, 16635586999056, 100439873614656, 604666567043712, 3629299734118656
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| a(n) equals the permanent of the nXn matrix with 1's along the central fifteen diagonals, and 0's everywhere else. [From John M. Campbell, Jul 10 2011]
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LINKS
| R. H. Hardin, Table of n, a(n) for n=1..400, Jul 11 2010
Torleiv Klove, 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.
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CROSSREFS
| Cf. A000045, A002524, A002526, A072856, A154654
Sequence in context: A033646 A177279 A173848 * A179354 A179360 A179367
Adjacent sequences: A154653 A154654 A154655 * A154657 A154658 A154659
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KEYWORD
| nonn
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AUTHOR
| Torleiv Klove (Torleiv.Klove(AT)ii.uib.no), Jan 13 2009
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