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A348764 Number of unsensed 4-regular maps with 2*n edges on the projective plane. 3
2, 6, 29, 153, 1015, 7572, 62316, 548575, 5069705, 48490576, 475784885, 4760060954, 48363620851, 497636022164 (list; graph; refs; listen; history; text; internal format)
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.

LINKS

Table of n, a(n) for n=1..14.

CROSSREFS

Cf. A348765-A348767.

Sequence in context: A136639 A284594 A027109 * A107375 A302863 A020126

Adjacent sequences:  A348761 A348762 A348763 * A348765 A348766 A348767

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Oct 31 2021

STATUS

approved

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Last modified July 2 03:39 EDT 2022. Contains 354985 sequences. (Running on oeis4.)