Number of isomorphism classes of associative non-commutative closed binary operations on a set of order n.
A079199
Number of isomorphism classes of associative non-commutative closed binary operations on a set of order n.
Terms
- a(0) =0a(1) =2a(2) =12a(3) =130a(4) =1590a(5) =26491a(6) =1610381a(7) =3683808612
External references
- oeis: A079199