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%I A308139 #5 May 14 2019 11:00:59
%S A308139 0,12,22928,10221735256,1881495851872220832
%N A308139 Number of (undirected) Hamiltonian paths on the n X n queen graph.
%H A308139 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a>
%H A308139 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/QueenGraph.html">Queen Graph</a>
%F A308139 a(n) = A158664(n)/2.
%Y A308139 Cf. A158664.
%K A308139 nonn,more,hard
%O A308139 1,2
%A A308139 _Eric W. Weisstein_, May 14 2019

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