Number of 4-regular maps with n vertices on the torus, up to orientation-preserving isomorphisms.

A292971

Number of 4-regular maps with n vertices on the torus, up to orientation-preserving isomorphisms.

Terms

    a(0) =1a(1) =4a(2) =23a(3) =185a(4) =1647a(5) =16455a(6) =169734a(7) =1805028a(8) =19472757a(9) =212603589a(10) =2341275180a(11) =25969695728a(12) =289782412836

External references