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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
OFFSET
4,2
CROSSREFS
Sequence in context: A349719 A283828 A306028 * A048351 A224734 A143436
KEYWORD
nonn
AUTHOR
Keith Briggs, Aug 10 2009
EXTENSIONS
Added term 9372645 (for n=11), Keith Briggs, Aug 25 2009
STATUS
approved