Number of tree-rooted toroidal maps with 2 faces and n vertices and without isthmuses.
A006436
Number of tree-rooted toroidal maps with 2 faces and n vertices and without isthmuses.
Terms
- a(0) =10a(1) =192a(2) =1630a(3) =8924a(4) =36834a(5) =124560a(6) =362934a(7) =941820a(8) =2227368a(9) =4881448a(10) =889015725
External references
- oeis: A006436