A129031 Number of n-node triangulations of the torus S_1 in which every node has degree >= 4.

0, 1, 6, 75, 887, 9732, 97106, 897351, 7824619, 65344834, 528138249, 4162485476

Offset

6,3

References

M. Jungerman and G. Ringel, Minimal triangulations on orientable surfaces, Acta Math. 145 (1980), 121-154.

Links

Table of n, a(n) for n=6..17.

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

Crossrefs

Sequence in context: A258270 A281797 A049235 * A234529 A139088 A193784

Adjacent sequences: A129028 A129029 A129030 * A129032 A129033 A129034

Keyword

nonn

Author

N. J. A. Sloane, May 12 2007

Status

approved