A084274 - OEIS

%I #7 Jul 29 2017 12:33:18

%S 0,0,0,1,60,4652

%N Number of labeled connected 4-chromatic (i.e., chromatic number = 4) graphs on n nodes.

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

%Y Cf. A001832, A084273.

%K nonn,more

%O 1,5

%A _Eric W. Weisstein_, May 24 2003