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A129043 Number of n-node triangulations of the projective plane N_1 in which every node has degree >= 3. 0
0, 1, 3, 16, 134, 1210, 11719, 114478, 1108826, 10606795, 100352404, 940956644, 8762227629, 81168427279, 748953936818 (list; graph; refs; listen; history; internal format)
OFFSET

5,3

REFERENCES

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

LINKS

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

CROSSREFS

Sequence in context: A141628 A048802 A119392 * A182951 A135746 A006057

Adjacent sequences:  A129040 A129041 A129042 * A129044 A129045 A129046

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), May 12 2007

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Last modified February 17 02:48 EST 2012. Contains 205978 sequences.