A292110 Number of 6-regular maps with n vertices on the torus, up to orientation-preserving and orientation-reversing isomorphisms.

3, 61, 1936, 89986, 4791784, 272005507, 15929826713, 951610091294, 57659992554993, 3532378891197016, 218331197907776846, 13594369669588615612

Offset

1,1

Links

Table of n, a(n) for n=1..12.

E. Krasko, A. Omelchenko, Enumeration of r-regular Maps on the Torus. Part II: Enumeration of Unsensed Maps, arXiv preprint arXiv:1709.03230 [math.CO], 2017. See Table 1, p. 20.

E. Krasko, A. Omelchenko, Enumeration of r-regular maps on the torus. Part II: Unsensed maps, Discrete Mathematics, Volume 342, Issue 2, February 2019, pp. 600-614.

Crossrefs

Cf. A292405, A292408, A292468, A292109.

Sequence in context: A224451 A239792 A009476 * A173366 A125661 A077353

Adjacent sequences: A292107 A292108 A292109 * A292111 A292112 A292113

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 20 2017

Extensions

a(11)-a(12) from Evgeniy Krasko, Sep 27 2017

Status

approved