27019896
domain: N
Appears in sequences
- Triangle read by rows: T(n,k) is the number of labeled commutative monoids of order n with k idempotents and a fixed identity.at n=44A058160
- Number of labeled lattices with a fixed bottom.at n=8A058164
- Triangle read by rows: T(n,k) is the number of labeled commutative semigroups of order n with k idempotents.at n=35A058167