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A129060 Number of n-node triangulations of the nonorientable surface N_5 in which every node has degree >= 6. 0
0, 2, 5839, 1117750, 41548569 (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: A078933 A064029 A057645 * A190127 A099690 A196750

Adjacent sequences:  A129057 A129058 A129059 * A129061 A129062 A129063

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, May 13 2007

STATUS

approved

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Last modified November 29 21:32 EST 2021. Contains 349416 sequences. (Running on oeis4.)