A319114 Number of simple toroidal graphs on n nodes.

0, 0, 0, 0, 1, 14, 222, 5365

Offset: 1

Author

Eric W. Weisstein, Sep 10 2018

Keywords

• nonn
• more

Comments

a(n) <= A145269(n).

a(n) = A145269(n) for n < 8.

a(8) = A145269(8) - 15 since there are 15 double-toroidal graphs on 8 nodes (all of which are connected).

Links

• Eric Weisstein's World of Mathematics, Simple Graph
• Eric Weisstein's World of Mathematics, Toroidal Graph

Crossrefs

Cf. A145269 (number of nonplanar simple graphs).