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Search: id:A075852
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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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+0 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
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