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%I #12 May 06 2017 23:39:50
%S 0,8,1408,1106016,27605259264,3564317860276224,28463849350128000663552
%N Number of directed Hamiltonian cycles on the n X n black bishop graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/BlackBishopGraph.html">Black Bishop Graph</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HamiltonianCycle.html">Hamiltonian Cycle</a>
%Y Cf. A282890 (numbers of Hamiltonian cycles in an n X n white bishop graph)
%K nonn,hard,more
%O 3,2
%A _Eric W. Weisstein_, Feb 24 2017
%E a(9) from _Andrew Howroyd_, May 06 2017
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