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A262296
Length of longest chain of nonempty proper inverse subsemigroups of the dual symmetric inverse monoid.
0
0, 2, 11, 49, 223, 1065, 5337, 28231, 158939
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..9.
P. J. Cameron, M. Gadouleau, J. D. Mitchell, Y. Peresse, Chains of subsemigroups, arXiv preprint arXiv:1501.06394 [math.GR], 2015.
CROSSREFS
Sequence in context: A034568 A265610 A036996 * A151314 A316263 A342906
Adjacent sequences: A262293 A262294 A262295 * A262297 A262298 A262299
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 21 2015
STATUS
approved

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Last modified May 22 01:14 EDT 2026. Contains 395813 sequences.
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