A241842 - OEIS

%I #8 Sep 14 2014 23:25:26

%S 0,0,1,4,18,106,846,11095,261056,11716488,1006700452

%N Number of simple connected graphs on n nodes that are non-integral.

%H Travis Hoppe and Anna Petrone, <a href="https://github.com/thoppe/Encyclopedia-of-Finite-Graphs">Encyclopedia of Finite Graphs</a>

%H T. Hoppe and A. Petrone, <a href="http://arxiv.org/abs/1408.3644">Integer sequence discovery from small graphs</a>, arXiv preprint arXiv:1408.3644, 2014

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

%F a(n) = A001349(n) - A064731(n).

%K nonn,less

%O 1,4

%A _Travis Hoppe_ and _Anna Petrone_, Apr 29 2014