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A129052 Number of n-node triangulations of the nonorientable surface N_3 in which every node has degree >= 6. 0
0, 23, 190, 758, 2037, 4574, 8929, 16026 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,2

REFERENCES

G. Ringel, Wie man die geschlossenen nichtorientierbaren Flaechen in moeglichst wenig Dreiecke zerlegen kann, Math. Ann. 130 (1955), 317-326.

LINKS

Table of n, a(n) for n=8..15.

Thom Sulanke, Generating triangulations of surfaces (surftri), (also subpages).

CROSSREFS

Sequence in context: A125360 A126518 A167467 * A201859 A232150 A269086

Adjacent sequences:  A129049 A129050 A129051 * A129053 A129054 A129055

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 13 2007

STATUS

approved

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Last modified May 19 15:27 EDT 2022. Contains 353834 sequences. (Running on oeis4.)