A129051 Number of n-node triangulations of the nonorientable surface N_3 in which every node has degree >= 5.

0, 111, 4523, 74307, 777348, 6255683, 42769083, 262073923

Offset

8,2

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=8..15.

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

Crossrefs

Sequence in context: A302956 A232080 A332914 * A012039 A286117 A286083

Adjacent sequences: A129048 A129049 A129050 * A129052 A129053 A129054

Keyword

nonn

Author

N. J. A. Sloane, May 13 2007

Status

approved