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Number of planar graphs with n nodes and chromatic number 4.
0

%I #3 Aug 15 2019 00:44:07

%S 1,4,26,214,2320,31858,518697,9372645

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

%K nonn

%O 4,2

%A _Keith Briggs_, Aug 10 2009

%E Added term 9372645 (for n=11), _Keith Briggs_, Aug 25 2009