%I #8 Dec 29 2022 15:12:07
%S 0,1,2,4,7,14,26,49,97,186,379
%N Number of simple disconnected integral graphs on n vertices.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/DisconnectedGraph.html">Disconnected Graph</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/IntegralGraph.html">Integral Graph</a>
%F a(n) = A077027(n) - A064731(n).
%Y Cf. A077027 (number of simple not necessarily connected integral graphs).
%Y Cf. A064731 (number of simple connected integral graphs).
%K nonn,more
%O 1,3
%A _Eric W. Weisstein_, May 20 2017