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A129056 Number of n-node triangulations of the nonorientable surface N_4 in which every node has degree >= 6. 0
0, 34, 3864, 87396, 818072, 4611407, 18933909 (list; graph; refs; listen; history; text; internal format)
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: A069223 A258499 A218718 * A212034 A297072 A232900

Adjacent sequences:  A129053 A129054 A129055 * A129057 A129058 A129059

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 13 2007

STATUS

approved

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Last modified April 21 11:02 EDT 2021. Contains 343150 sequences. (Running on oeis4.)