A129049 Number of n-node triangulations of the nonorientable surface N_3 in which every node has degree >= 3.

0, 133, 11784, 530278, 16306649, 392973078, 8001174073, 144075560093

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: A254684 A133240 A129050 * A281496 A015264 A055579

Adjacent sequences: A129046 A129047 A129048 * A129050 A129051 A129052

Keyword

nonn

Author

N. J. A. Sloane, May 13 2007

Status

approved