OFFSET
1,1
REFERENCES
Krasko, Evgeniy, and Alexander Omelchenko. "Enumeration of unsensed r-regular maps on the projective plane and the Klein bottle." Discrete Mathematics 344.11 (2021): #112528.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 31 2021
STATUS
approved