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A319114 Number of simple toroidal graphs on n nodes. 0
0, 0, 0, 0, 1, 14, 222, 5365 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

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

Table of n, a(n) for n=1..8.

Eric Weisstein's World of Mathematics, Simple Graph

Eric Weisstein's World of Mathematics, Toroidal Graph

CROSSREFS

Cf. A145269 (number of nonplanar simple graphs).

Sequence in context: A113894 A225315 A292041 * A145269 A221582 A320762

Adjacent sequences: A319111 A319112 A319113 * A319115 A319116 A319117

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Sep 10 2018

STATUS

approved

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Last modified February 6 18:02 EST 2023. Contains 360111 sequences. (Running on oeis4.)