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A076321 Number of 9-colorable (i.e., chromatic number <= 9) simple graphs on n nodes. 8

%I

%S 1,2,4,11,34,156,1044,12346,274668,12005167,1018997853

%N Number of 9-colorable (i.e., chromatic number <= 9) 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) = A076320(n) + A205568(n). - _Andrew Howroyd_, Dec 02 2018

%Y Cf. A033995, A076315, A076316, A076317, A076318, A076319, A076320, A205568.

%Y Cf. A000088. [_R. J. Mathar_, Sep 21 2008]

%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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Last modified May 6 13:04 EDT 2021. Contains 343585 sequences. (Running on oeis4.)