A126752 - OEIS

This site is supported by donations to The OEIS Foundation.

A126752

Number of biconnected graphs on n nodes with chromatic number 4.

0, 0, 0, 1, 2, 17, 189, 3627, 118114, 6530233 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,5`
	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	`A diagonal of triangle in A126749.` `Sequence in context: A102023 A058010 A199751 * A004029 A114268 A144208` `Adjacent sequences: A126749 A126750 A126751 * A126753 A126754 A126755`
	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 15 14:20 EST 2012. Contains 205811 sequences.