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A075852
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Number of permutations s of {1,2,...,n} such that |s(i)-i|>3 for each i=1,2,...,n.
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5
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0, 0, 0, 0, 0, 0, 0, 1, 16, 436, 6984, 114124, 1799688, 29125117, 486980182, 8490078104, 154750897552, 2951968964768, 58917663227568, 1229367602071416
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,9
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COMMENTS
| a(n) equals the permanent of the nXn matrix with 0's along the main diagonal, the subdiagonal, the superdiagonal, the sub-subdiagonal, the super-superdiagonal, the sub-sub-subdiagonal, the super-super-superdiagonal, and 1's everywhere else. [From John M. Campbell, Jul 09 2011]
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CROSSREFS
| Cf. A001883, A075851.
Sequence in context: A111921 A118994 A000489 * A068792 A159646 A113674
Adjacent sequences: A075849 A075850 A075851 * A075853 A075854 A075855
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KEYWORD
| nonn
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AUTHOR
| Reiner Martin (reinermartin(AT)hotmail.com), Oct 15 2002
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EXTENSIONS
| More terms from Vladimir Baltic, Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 04 2003
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