Number of nonseparable toroidal tree-rooted maps with n + 3 edges and n + 1 vertices.

A006415

Number of nonseparable toroidal tree-rooted maps with n + 3 edges and n + 1 vertices.

Terms

    a(0) =4a(1) =104a(2) =1020a(3) =6092a(4) =26670a(5) =94128a(6) =283338a(7) =754380a(8) =1821534a(9) =4061200

External references