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A001185 Number of nontrivial Baxter permutations of length 2n-1.
(Formerly M4372 N1837)
+0
3
0, 1, 1, 7, 21, 112, 456, 2603, 13203 (list; graph; listen)
OFFSET

1,4

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).

W. M. Boyce, Generation of a class of permutations associated with commuting functions, Math. Algorithms, 2 (1967), 19-26.

CROSSREFS

Cf. A001181, A001183.

Sequence in context: A100025 A121157 A038184 this_sequence A001693 A061961 A028248

Adjacent sequences: A001182 A001183 A001184 this_sequence A001186 A001187 A001188

KEYWORD

nonn,nice,more

AUTHOR

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

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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