A129044 - OEIS

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A129044

Number of n-node triangulations of the projective plane N_1 in which every node has degree >= 4.

0, 1, 2, 8, 36, 185, 1050, 6421, 40623, 261828, 1701370, 11098331, 72534862, 474641785 (list; graph; refs; listen; history; internal format)

	OFFSET	`5,3`
	REFERENCES	`G. Ringel, Wie man die geschlossenen nichtorientierbaren Flaechen in moeglichst wenig Dreiecke zerlegen kann, Math. Ann. 130 (1955), 317-326.`
	LINKS	`Thom Sulanke, Generating triangulations of surfaces (surftri), (also subpages).`
	CROSSREFS	`Sequence in context: A129148 A081958 A001540 * A052582 A020021 A052618` `Adjacent sequences: A129041 A129042 A129043 * A129045 A129046 A129047`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 12 2007`

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Last modified February 16 18:43 EST 2012. Contains 205939 sequences.