%I
%S 1,2,3,4,5,7,8,9,10,11,15,16,17,19,23,31,32,33,34,35,36,37,39,42,43,
%T 45,47,63,64,65,67,69,71,75,79,95,127,128,129,130,131,133,135,136,137,
%U 138,139,141,143,151,153,155,159,170,171,175,187,191,255,256,257,259,260
%N Smallest number at which a new Haar graph is encountered.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HaarGraph.html">Haar Graph</a>
%e Haar(5) and Haar(6) are both isomorphic to the 6cycle graph, so 5 appears in the sequence but 6 does not.
%Y Cf. A272919 (numbers that uniquely index a Haar graph).
%K nonn
%O 1,2
%A _Eric W. Weisstein_, Feb 07 2008
%E Name clarified by _Eric W. Weisstein_, Aug 19 2017
