A129050 Number of n-node triangulations of the nonorientable surface N_3 in which every node has degree >= 4.

0, 133, 9385, 298323, 6162345, 97905411, 1308857389, 15516720575, 168565283562, 1714609792914

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..17.

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

Crossrefs

Sequence in context: A262121 A254684 A133240 * A129049 A281496 A015264

Adjacent sequences: A129047 A129048 A129049 * A129051 A129052 A129053

Keyword

nonn

Author

N. J. A. Sloane, May 13 2007

Status

approved