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A234280 Number of 231-avoiding extensions of comb K_{s,3}^{alpha}. 0
1, 8, 91, 1210, 17606 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
No formula is presently known.
LINKS
Table of n, a(n) for n=1..5.
Sophia Yakoubov, Pattern avoidance in extensions of comb-like posets, Journal of Combinatorics, Vol. 6, No. 1-2 (2015), pp. 249-272; arXiv preprint, arXiv:1310.2979 [math.CO], 2013-2014.
CROSSREFS
Sequence in context: A184709 A190943 A180912 * A298013 A302614 A220573
Adjacent sequences: A234277 A234278 A234279 * A234281 A234282 A234283
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Dec 28 2013
EXTENSIONS
a(5) added by Amiram Eldar, May 06 2024
STATUS
approved

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Last modified June 4 17:49 EDT 2024. Contains 373102 sequences. (Running on oeis4.)