A286278 Number of proper chiral (irreflexible) orientably-regular hypermaps on a surface of genus n, up to isomorphism, triality and reflection.

0, 1, 1, 0, 1, 1, 2, 2, 6, 5, 7, 1, 4, 6, 7, 8, 1, 12, 3, 11, 13, 0, 8, 7, 9, 11, 14, 10, 3, 18, 5, 15, 19, 9, 11, 14, 4, 11, 33, 46, 4, 24, 5, 15, 24, 3, 6, 31, 26, 33, 15, 21, 8, 34, 12, 40, 24, 16, 12, 48, 4, 13, 75, 55, 12, 16, 8, 22, 18, 31, 10, 77, 10

Offset: 2

Author

N. J. A. Sloane, May 08 2017

Keywords

• nonn

Links

• Andrey Zabolotskiy, Table of n, a(n) for n = 2..101
• Marston Conder, Home Page (Contains tables of regular maps, hypermaps and polytopes, trivalent symmetric graphs, and surface actions)
• Marston Conder, Chiral proper orientably-regular hypermaps of genus 2 to 101

Extensions

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