A286277 - OEIS

A286277

Number of proper non-orientable regular hypermaps on a surface of genus n, up to isomorphism and triality.

0, 0, 1, 0, 1, 0, 0, 1, 5, 0, 1, 0, 1, 0, 2, 4, 0, 0, 1, 0, 3, 1, 0, 2, 5, 0, 1, 3, 11, 0, 1, 0, 12, 0, 0, 0, 3, 0, 1, 2, 3, 0, 4, 0, 6, 3, 0, 0, 3, 0, 5, 1, 0, 0, 2, 4, 10, 0, 5, 0, 3, 0, 1, 8, 7, 0, 0, 0, 8, 0, 10, 0, 2, 0, 1, 2, 6, 4, 0, 0, 20, 5, 0, 0, 10

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,9

LINKS

Andrey Zabolotskiy, Table of n, a(n) for n = 2..202

Marston Conder, Home Page (Contains tables of regular maps, hypermaps and polytopes, trivalent symmetric graphs, and surface actions)

Marston Conder, Non-orientable proper regular hypermaps of genus 2 to 202

CROSSREFS

Sequence in context: A082512 A068385 A318657 * A225749 A227985 A071086

Adjacent sequences: A286274 A286275 A286276 * A286278 A286279 A286280

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 08 2017

EXTENSIONS

Terms a(25) and beyond from Conder's file added by Andrey Zabolotskiy, Dec 14 2022

STATUS

approved