The number of non-degenerate involutive set-theoretic solutions of the Yang-Baxter equation of order n up to isomorphism.
A290887
The number of non-degenerate involutive set-theoretic solutions of the Yang-Baxter equation of order n up to isomorphism.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =23a(4) =88a(5) =595a(6) =3456a(7) =34530a(8) =321931a(9) =4895272
External references
- oeis: A290887