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A001183 Number of nontrivial Baxter permutations of length 2n-1.
(Formerly M0390 N0148)
3
0, 2, 2, 18, 66, 374, 1694, 9822, 51698 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

REFERENCES

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

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

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

CROSSREFS

Cf. A001181, A001185, A046996.

Sequence in context: A100304 A096190 A136434 * A201124 A184317 A141084

Adjacent sequences:  A001180 A001181 A001182 * A001184 A001185 A001186

KEYWORD

nonn,more

AUTHOR

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

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Last modified February 14 09:35 EST 2012. Contains 205614 sequences.