A234283 - OEIS

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A234283

Number of 321-avoiding extensions of comb K_{s,3}^{alpha}.

0

1, 10, 161, 3196

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OFFSET

1,2

COMMENTS

No formula is presently known.

LINKS

Table of n, a(n) for n=1..4.

S. Yakoubov, Pattern Avoidance in Extensions of Comb-Like Posets, arXiv preprint arXiv:1310.2979, 2013

CROSSREFS

Sequence in context: A366037 A090374 A034724 * A074703 A374423 A190903

Adjacent sequences: A234280 A234281 A234282 * A234284 A234285 A234286

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Dec 28 2013

STATUS

approved