Number of asymmetric monoids (semigroups with identity) of order n.
A058130
Number of asymmetric monoids (semigroups with identity) of order n.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =19a(4) =128a(5) =1344a(6) =20997a(7) =1479686
External references
- oeis: A058130