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A164101 Number of planar graphs with n nodes and chromatic number 4. 0
1, 4, 26, 214, 2320, 31858, 518697, 9372645 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

LINKS

Table of n, a(n) for n=4..11.

CROSSREFS

Sequence in context: A274735 A283828 A306028 * A048351 A224734 A143436

Adjacent sequences:  A164098 A164099 A164100 * A164102 A164103 A164104

KEYWORD

nonn

AUTHOR

Keith Briggs, Aug 10 2009

EXTENSIONS

Added term 9372645 (for n=11), Keith Briggs, Aug 25 2009

STATUS

approved

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Last modified October 24 12:42 EDT 2021. Contains 348231 sequences. (Running on oeis4.)