%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
