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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 (list; graph; refs; listen; history; text; internal format)
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.

CROSSREFS

Cf. A338724.

Sequence in context: A258498 A189919 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 April 14 01:17 EDT 2021. Contains 342941 sequences. (Running on oeis4.)