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A205568 Number of 9-chromatic (i.e., chromatic number equals 9) simple graphs on n nodes. 3

%I #10 Jan 20 2020 17:11:13

%S 0,0,0,0,0,0,0,0,1,9,222

%N Number of 9-chromatic (i.e., chromatic number equals 9) simple graphs on n nodes.

%H Keith M. Briggs, <a href="http://keithbriggs.info/cgt.html">Combinatorial Graph Theory</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/n-ChromaticGraph.html">n-Chromatic Graph</a>

%Y Column k=9 of A084268.

%Y Cf. A076278, A076279, A076281, A076282.

%K nonn,more

%O 1,10

%A _Michael Sollami_, Jan 28 2012

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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)