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A338725
Number of matchings avoiding a certain pattern (see Cervetti-Ferrari, Cor. 3.1(ii)).
1
1, 3, 15, 105, 944, 10341, 133132, 1961919, 32441303, 592718236
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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.
A338724
.
Sequence in context:
A189919
A360579
A251598
*
A295871
A293997
A328866
Adjacent sequences:
A338722
A338723
A338724
*
A338726
A338727
A338728
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Nov 30 2020
STATUS
approved
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Last modified June 30 00:34 EDT 2024. Contains 373859 sequences. (Running on oeis4.)