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Number of (non-null) connected induced subgraphs in the n X n knight graph.
2

%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