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A129059 Number of n-node triangulations of the nonorientable surface N_5 in which every node has degree >= 5. 0
0, 2, 6945, 2619076, 225843445 (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..12.

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

CROSSREFS

Sequence in context: A107022 A285693 A112720 * A129058 A129057 A201508

Adjacent sequences:  A129056 A129057 A129058 * A129060 A129061 A129062

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 13 2007

STATUS

approved

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Last modified October 16 13:51 EDT 2019. Contains 328093 sequences. (Running on oeis4.)