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%I #16 Sep 03 2017 03:19:29
%S 1,4,84,16900,39932844,1361720957184,774585118899294568,
%T 8454365006540284439239696,1984702974673190711327564424138048,
%U 11162924792761237570313905721795529333447744,1649914801339506800304019030963996680128410488784164960,6996584578812582654135225585307693014250183123864863361126056356416,919794116459365136444247186352581193250325236478988411540394596132809895149151936
%N Number of matchings in the n X n bishop graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/BishopGraph.html">Bishop Graph</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/IndependentEdgeSet.html">Independent Edge Set</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Matching.html">Matching</a>
%F a(n) = A286422(n) * A286423(n). - _Andrew Howroyd_, May 23 2017
%Y Cf. A286422, A286423.
%K nonn
%O 1,2
%A _Eric W. Weisstein_, May 22 2017
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