id:A164101 - OEIS Search Results

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Number of planar graphs with n nodes and chromatic number 4.

+0
1

1, 4, 26, 214, 2320, 31858, 518697, 9372645 (list; graph; listen)

	OFFSET	`4,2`
	CROSSREFS	`Sequence in context: A141381 A118971 A124554 this_sequence A048351 A143436 A135884` `Adjacent sequences: A164098 A164099 A164100 this_sequence A164102 A164103 A164104`
	KEYWORD	`nonn`
	AUTHOR	`Keith Briggs (keith.briggs(AT)bt.com), Aug 10 2009`
	EXTENSIONS	`Added term 9372645 (for n=11). Keith Briggs (keith.briggs(AT)bt.com), Aug 25 2009`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.