%I #8 Aug 16 2017 03:56:20
%S 1,3,15,251,65039,4292581227
%N Number of connected (non-null) induced subgraphs of the n-halved cube graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ConnectedGraph.html">Connected Graph</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HalvedCubeGraph.html">Halved Cube Graph</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Vertex-InducedSubgraph.html">Vertex-Induced Subgraph</a>
%Y Cf. A288987, A290758.
%K nonn,more
%O 1,2
%A _Eric W. Weisstein_, Jun 20 2017
%E a(6) from _Andrew Howroyd_, Aug 15 2017