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Search: id:A050212
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| A050212 |
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Triangle of number of permutations of {1, 2, ..., n} having exactly k cycles, each of which is of length >=r for r=4. |
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3
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| 6, 24, 120, 720, 5040, 1260, 40320, 18144, 362880, 223776, 3628800, 2756160, 39916800, 35307360, 1247400, 479001600, 476910720, 38918880, 6227020800, 6822541440, 889945056, 87178291200, 103440879360, 18478684224
(list; table; graph; listen)
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OFFSET
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1,1
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COMMENT
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Generalizes Stirling numbers of the first kind
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REFERENCES
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L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 257.
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LINKS
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Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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CROSSREFS
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Cf. A008275, A008306, A050211, A050213.
Sequence in context: A127917 A026982 A051197 this_sequence A047865 A060249 A052557
Adjacent sequences: A050209 A050210 A050211 this_sequence A050213 A050214 A050215
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KEYWORD
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nonn,tabl
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com)
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