A322930 a(n) is the number of rooted 6-regular maps with n vertices on the projective plane.

22, 864, 40512, 2075860, 112225776, 6289396632, 361699896960, 21210328632420, 1262859239910000, 76114899842912520

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, Pages 584-599.

Crossrefs

Sequence in context: A231159 A095696 A345456 * A200575 A102995 A211887

Adjacent sequences: A322927 A322928 A322929 * A322931 A322932 A322933

Keyword

nonn,more

Author

Evgeniy Krasko, Dec 31 2018

Status

approved