Number of isomorphism classes of commutative closed binary operations (groupoids) on a set of order n, listed by class size.
A079185
Number of isomorphism classes of commutative closed binary operations (groupoids) on a set of order n, listed by class size.
Terms
- a(0) =1a(1) =0a(2) =4a(3) =1a(4) =4a(5) =8a(6) =116a(7) =0a(8) =0a(9) =0a(10) =8a(11) =0a(12) =28a(13) =504a(14) =43428
External references
- oeis: A079185