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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
OFFSET
0,5
LINKS
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
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Nov 09 2016
STATUS
approved