A129054 Number of n-node triangulations of the nonorientable surface N_4 in which every node has degree >= 4.

0, 37, 13067, 1314000, 61111294, 1787036930, 38628806361

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: A129055 A193158 A202794 * A129053 A324256 A096349

Adjacent sequences: A129051 A129052 A129053 * A129055 A129056 A129057

Keyword

nonn

Author

N. J. A. Sloane, May 13 2007

Status

approved