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A129045
Number of n-node triangulations of the projective plane N_1 in which every node has degree >= 5.
0
0, 1, 0, 1, 1, 3, 7, 16, 44, 134, 433, 1483, 5196, 18795, 68845
(list; graph; refs; listen; history; text; internal format)
OFFSET
5,6
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=5..19.
Thom Sulanke, Generating triangulations of surfaces (surftri), (also subpages).
CROSSREFS
Sequence in context: A144977 A058300 A000674 * A217358 A323692 A360782
Adjacent sequences: A129042 A129043 A129044 * A129046 A129047 A129048
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 13 2007
STATUS
approved

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Last modified February 21 07:59 EST 2025. Contains 381069 sequences.
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