A058143 Number of commutative monoids of order n with 2 idempotents.
1, 3, 9, 26, 98, 455, 4018, 101910, 10054303
Offset: 2
Crossrefs
Column 2 of A058142.
Extensions
a(8)-a(10) from Andrew Howroyd, Feb 15 2022
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