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Search: id:A001251
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| A001251 |
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Number of permutations of length n by length of runs.
(Formerly M2031 N0803)
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+0
1
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| 2, 12, 70, 442, 3108, 24216, 208586, 1972904, 20373338, 228346522, 2763259364, 35927135944
(list; graph; listen)
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