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A234844 Number of inverse monoids of order n. 3
1, 2, 4, 11, 27, 89, 310, 1311, 6253, 34325, 212247, 1466180, 11167987, 92889294, 836021796 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

Martin E. Malandro, Enumeration of finite inverse semigroups, arXiv:1312.7192 [math.CO]

CROSSREFS

Cf. A001428 (inverse semigroups), A234843 (commutative inverse semigroups), A234845 (commutative inverse monoids).

Sequence in context: A131482 A234845 A148131 * A205504 A290337 A099412

Adjacent sequences:  A234841 A234842 A234843 * A234845 A234846 A234847

KEYWORD

nonn,hard,more

AUTHOR

Joerg Arndt, Dec 31 2013

STATUS

approved

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Last modified September 21 04:58 EDT 2020. Contains 337267 sequences. (Running on oeis4.)