A129053 Number of n-node triangulations of the nonorientable surface N_4 in which every node has degree >= 3.

0, 37, 13657, 1628504, 99694693, 4076362798, 127322830218

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..14.

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

Crossrefs

Sequence in context: A193158 A202794 A129054 * A324256 A096349 A015061

Adjacent sequences: A129050 A129051 A129052 * A129054 A129055 A129056

Keyword

nonn

Author

N. J. A. Sloane, May 13 2007

Status

approved