id:A126752 - OEIS Search Results

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

+0
1

0, 0, 0, 1, 2, 17, 189, 3627, 118114, 6530233 (list; graph; listen)

	OFFSET	`1,5`
	COMMENT	`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: A011550 A102023 A058010 this_sequence A004029 A144208 A058239` `Adjacent sequences: A126749 A126750 A126751 this_sequence A126753 A126754 A126755`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Feb 18 2007`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.