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A338724
Number of matchings avoiding a certain pattern (see Cervetti-Ferrari, Cor. 3.1(i)).
1
1, 3, 15, 104, 910, 9503, 114317, 1547124, 23169162, 379308106
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..10.
Matteo Cervetti and Luca Ferrari,
Pattern avoidance in the matching pattern poset
, arXiv:2009.01024 [math.CO], 2020.
Matteo Cervetti and Luca Ferrari,
Enumeration of Some Classes of Pattern Avoiding Matchings, with a Glimpse into the Matching Pattern Poset
, Annals of Combinatorics (2022).
CROSSREFS
Cf.
A338725
.
Sequence in context:
A139766
A003276
A136092
*
A273197
A255427
A181131
Adjacent sequences:
A338721
A338722
A338723
*
A338725
A338726
A338727
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Nov 30 2020
STATUS
approved
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Last modified August 9 21:21 EDT 2024. Contains 375044 sequences. (Running on oeis4.)