A164099 - OEIS

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A164099

Number of planar graphs with n nodes and chromatic number 2.

1, 2, 6, 12, 33, 83, 273, 937, 3983, 18871 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,2`
	CROSSREFS	`Sequence in context: A102881 A057579 A096610 * A088808 A076278 A204512` `Adjacent sequences: A164096 A164097 A164098 * A164100 A164101 A164102`
	KEYWORD	`nonn`
	AUTHOR	`Keith Briggs (keith.briggs(AT)bt.com), Aug 10 2009`
	EXTENSIONS	`Added term 18871 (for n=11). Keith Briggs (keith.briggs(AT)bt.com), Aug 25 2009`

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Last modified February 16 11:51 EST 2012. Contains 205908 sequences.