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A129050 Number of n-node triangulations of the nonorientable surface N_3 in which every node has degree >= 4. 0
0, 133, 9385, 298323, 6162345, 97905411, 1308857389, 15516720575, 168565283562, 1714609792914 (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..17.

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

CROSSREFS

Sequence in context: A262121 A254684 A133240 * A129049 A281496 A015264

Adjacent sequences:  A129047 A129048 A129049 * A129051 A129052 A129053

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 13 2007

STATUS

approved

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Last modified October 4 19:10 EDT 2022. Contains 357239 sequences. (Running on oeis4.)