Number of nonisomorphic commutative idempotent groupoids with a nontrivial symmetry.
A030259
Number of nonisomorphic commutative idempotent groupoids with a nontrivial symmetry.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =4a(4) =38a(5) =1894
External references
- oeis: A030259