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A217829 Number of permutations of length 3n with descent set {3, 6, ...} that avoid a certain pattern of length 4 or 5 (see Lewis, 2012, Appendix, for precise definition). 0
1, 19, 1134, 115515, 16254118, 2848701388 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
J. B. Lewis, Pattern Avoidance for Alternating Permutations and Reading Words of Tableaux, Ph. D. Dissertation, Department of Mathematics, MIT, 2012.
CROSSREFS
Sequence in context: A217827 A098635 A217828 * A063442 A091750 A316332
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 13 2012
EXTENSIONS
a(5)-a(6) from Lars Blomberg, Mar 09 2018
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)