A126756 - OEIS

This site is supported by donations to The OEIS Foundation.

A126756

Number of biconnected triangle-free graphs on n nodes with chromatic number 3.

0, 0, 0, 0, 1, 1, 8, 36, 269, 2418, 29216, 458445, 9373692, 249530113 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,7`
	COMMENTS	`It is possible that the definition should say "connected" rather than "biconnected". Should be rechecked! - Max Alekseyev and Brendan McKay, Jun 17 2008`
	LINKS	`Keith M. Briggs, Combinatorial Graph Theory`
	CROSSREFS	`Sequence in context: A032770 A032794 A000757 * A203297 A181072 A058823` `Adjacent sequences: A126753 A126754 A126755 * A126757 A126758 A126759`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Feb 18 2007`

Content is available under The OEIS End-User License Agreement .

Last modified February 16 17:48 EST 2012. Contains 205939 sequences.