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A348767 Number of unsensed 3-regular maps with 3*n edges on the Klein bottle. 3
2, 12, 72, 570, 4948, 48258, 494559, 5264665, 57216730, 630853639, 7023102071, 78752243387, 888014678913, 10058897467374 (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. A348764-A348766.

Sequence in context: A277490 A296975 A144086 * A335786 A005443 A002867

Adjacent sequences:  A348764 A348765 A348766 * A348768 A348769 A348770

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Oct 31 2021

STATUS

approved

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Last modified May 28 15:04 EDT 2022. Contains 354115 sequences. (Running on oeis4.)