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Search: id:A154654
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| A154654 |
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Number of permutations of length n within distance 5 |
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+0
7
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| 1, 2, 6, 24, 120, 720, 3720, 17304, 76110, 329462, 1441923, 6487445, 29555588, 135025756, 615260976, 2791161792, 12618600768, 57008446080, 257708989200, 1166042944564, 5279435858788, 23908888017477, 108262665958797
(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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FORMULA
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G.f is a rational function f(x)/g(x) where f has degree 132 and g has degree 142.
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CROSSREFS
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Cf. A000045, A002524, A002526, A072856
Sequence in context: A071088 A122417 A033644 this_sequence A070947 A060727 A152350
Adjacent sequences: A154651 A154652 A154653 this_sequence A154655 A154656 A154657
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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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