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A278026 Number of 1324-avoiding permutations of length n with a non-intersecting boundary of type (t, 2), for some integer t >= 1, 0
0, 0, 1, 1, 4, 14, 49, 174, 626, 2276, 8346, 30821, 114495, 427481 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..13.

C. Bean, M. Tannock and H. Ulfarsson, Pattern avoiding permutations and independent sets in graphs, arXiv:1512.08155 [math.CO], 2015. See Prop. 5.17.

CROSSREFS

Sequence in context: A071741 A211305 A316974 * A001894 A215493 A079309

Adjacent sequences:  A278023 A278024 A278025 * A278027 A278028 A278029

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Nov 09 2016

STATUS

approved

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Last modified April 22 12:53 EDT 2021. Contains 343177 sequences. (Running on oeis4.)