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%I #9 Dec 02 2018 14:41:24
%S 1,2,4,11,34,156,1043,12338,274541,12000742,1018595454
%N Number of 6-colorable (i.e., chromatic number <= 6) simple graphs on n nodes.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/n-ColorableGraph.html">n-Colorable Graph</a>
%F a(n) = A076317(n) + A076282(n). - _Andrew Howroyd_, Dec 02 2018
%Y Cf. A033995, A076282, A076315, A076316, A076317, A076319, A076320, A076321.
%K nonn,more
%O 1,2
%A _Eric W. Weisstein_, Oct 06 2002
%E a(10)-a(11) from _Andrew Howroyd_, Dec 02 2018
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