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%I #8 Jul 22 2015 04:07:17
%S 0,0,0,0,1,1,8,36,269,2418,29216,458445,9373692,249530113
%N Number of biconnected triangle-free graphs on n nodes with chromatic number 3.
%C It is possible that the definition should say "connected" rather than "biconnected". Should be rechecked! - _Max Alekseyev_ and _Brendan McKay_, Jun 17 2008
%H Keith M. Briggs, <a href="http://keithbriggs.info/cgt.html">Combinatorial Graph Theory</a>
%K nonn,more
%O 1,7
%A _N. J. A. Sloane_, Feb 18 2007
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