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A176142 Number of nonequivalent monoids of order n in which the action of the unit group on the maximal ideal is nontrivial.

Original entry on oeis.org

0, 0, 0, 2, 5, 58, 428, 5539, 101082, 9269715
Offset: 1

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Author

Andreas Distler, Apr 10 2010

Keywords

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Monoids are considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator).
The invertible elements form the unit group of the monoid, all remaining elements form the maximal ideal.

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Crossrefs

Cf. A058133, A151823

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