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%I #8 Feb 22 2021 01:37:53
%S 1,2,72,2016,22615200,61903180800,383946391896883200,
%T 291754347175555891200000,1589674150230421751470227456000000,
%U 653674192758917925444914420184514560000000,4669210639701352189820773315967264103247065907200000000
%N Number of maximum matchings in the n X n rook graph.
%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>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/MaximumIndependentEdgeSet.html">Maximum Independent Edge Set</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/RookGraph.html">Rook Graph</a>
%Y Main diagonal of A341850.
%Y Cf. A270228, A289198.
%K nonn
%O 1,2
%A _Eric W. Weisstein_, Jun 28 2017
%E Terms a(7) and beyond from _Andrew Howroyd_, Feb 21 2021
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