A129061 - OEIS

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A129061

Number of n-node triangulations of the nonorientable surface N_5 in which every node has degree >= 7.

0

0, 2, 1679, 41336, 195779

(list; graph; refs; listen; history; text; internal format)

OFFSET

8,2

LINKS

Table of n, a(n) for n=8..12.

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

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

CROSSREFS

Sequence in context: A002490 A179961 A160224 * A233132 A277389 A011541

Adjacent sequences: A129058 A129059 A129060 * A129062 A129063 A129064

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, May 13 2007

STATUS

approved