A322929 a(n) is the number of rooted 5-regular maps with 2n vertices on the projective plane.

215, 106820, 65476730, 44355884860, 31871222091735, 23809740820038860, 18286634336378438820, 14338651143931504204140, 11425366917170617116755180, 9221856681066077433854516240

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: A085754 A232252 A002239 * A013546 A192073 A018863

Adjacent sequences: A322926 A322927 A322928 * A322930 A322931 A322932

Keyword

nonn

Author

Evgeniy Krasko, Dec 31 2018

Status

approved