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%I #5 Feb 16 2025 08:33:51
%S 1,2,34,161966673
%N Number of matchings in the n-transposition graph.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IndependentEdgeSet.html">Independent Edge Set</a>
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Matching.html">Matching</a>
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TranspositionGraph.html">Transposition Graph</a>
%K nonn,more,changed
%O 1,2
%A _Eric W. Weisstein_, Oct 03 2017