A129047 - OEIS

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A129047

Number of n-node triangulations of the Klein bottle N_2 in which every node has degree >= 4.

0, 6, 133, 1971, 23541, 245261, 2326207, 20685641, 175544819, 1438903377, 11485167375 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`7,2`
	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=7..17.` `Thom Sulanke, Generating triangulations of surfaces (surftri), (also subpages).`
	CROSSREFS	`Sequence in context: A350611 A247012 A003373 * A209276 A244745 A179564` `Adjacent sequences: A129044 A129045 A129046 * A129048 A129049 A129050`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane, May 13 2007`
	STATUS	`approved`

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Last modified December 4 18:06 EST 2023. Contains 367563 sequences. (Running on oeis4.)