id:A126751 - OEIS Search Results

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

+0
1

0, 0, 1, 1, 6, 30, 232, 2762, 50814, 1420183 (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: A054721 A074111 A073087 this_sequence A009689 A133668 A121772` `Adjacent sequences: A126748 A126749 A126750 this_sequence A126752 A126753 A126754`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Feb 18 2007`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.