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Search: id:A154656
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| A154656 |
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Number of permutations of length n within distance 7 |
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+0
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; listen)
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OFFSET
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1,2
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LINKS
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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
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Cf. A000045, A002524, A002526, A072856, A154654
Sequence in context: A072131 A067455 A033646 this_sequence A152628 A152647 A152642
Adjacent sequences: A154653 A154654 A154655 this_sequence A154657 A154658 A154659
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KEYWORD
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nonn
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AUTHOR
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Torleiv Klove (Torleiv.Klove(AT)ii.uib.no), Jan 13 2009
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