6,4

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

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

Sequence in context: A029268 A064191 A127420 this_sequence A054090 A122517 A123199

Adjacent sequences: A129030 A129031 A129032 this_sequence A129034 A129035 A129036

nonn

N. J. A. Sloane (njas(AT)research.att.com), May 12 2007