A322918 a(n) is the number of rooted 6-regular maps with n vertices on the torus.

10, 800, 58000, 4080000, 283100000, 19496000000, 1336380000000, 91320000000000, 6226591000000000, 423871680000000000

Offset

1,1

Links

Table of n, a(n) for n=1..10.

E. Krasko, A. Omelchenko, Enumeration of r-regular Maps on the Torus. Part I: Enumeration of Rooted and Sensed Maps, arXiv:1709.03225 [math.CO], 2017.

E. Krasko, A. Omelchenko, Enumeration of r-regular maps on the torus. Part I: Rooted maps on the torus, the projective plane and the Klein bottle. Sensed maps on the torus, Discrete Mathematics, Volume 342, Issue 2, February 2019, pp. 584-599.

Crossrefs

Sequence in context: A221045 A015057 A302133 * A233170 A211913 A347845

Adjacent sequences: A322915 A322916 A322917 * A322919 A322920 A322921

Keyword

nonn,more

Author

Evgeniy Krasko, Dec 30 2018

Status

approved