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A129058
Number of n-node triangulations of the nonorientable surface N_5 in which every node has degree >= 4.
0
0, 2, 7044, 3175312, 382274854
OFFSET
8,2
REFERENCES
G. Ringel, Wie man die geschlossenen nichtorientierbaren Flaechen in moeglichst wenig Dreiecke zerlegen kann, Math. Ann. 130 (1955), 317-326.
CROSSREFS
Sequence in context: A285693 A112720 A129059 * A129057 A201508 A322126
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 13 2007
STATUS
approved