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%I #12 Aug 16 2017 22:46:40
%S 1,4,58,16790,10976541,17934472404,115038147988542,3086974276257455630
%N Number of (non-null) connected induced subgraphs in the n X n knight 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/KnightGraph.html">Knight Graph</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Vertex-InducedSubgraph.html">Vertex-Induced Subgraph</a>
%K nonn,more
%O 1,2
%A _Eric W. Weisstein_, Aug 10 2017
%E a(6)-a(8) from _Andrew Howroyd_, Aug 15 2017
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