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A001253 Number of permutations of length n by length of runs.
(Formerly M2123 N0840)
+0
1
2, 20, 198, 2048, 22468, 264538, 3340962, 45173518, 652197968, 10024549190 (list; graph; listen)
OFFSET

5,1

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

F. N. David, M. G. Kendall and D. E. Barton, Symmetric Function and Allied Tables, Cambridge, 1966, p. 262.

CROSSREFS

Sequence in context: A037566 A125857 A001078 this_sequence A085586 A136902 A136884

Adjacent sequences: A001250 A001251 A001252 this_sequence A001254 A001255 A001256

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.


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