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%I #5 May 07 2019 15:10:08
%S 0,1,36,27267618816
%N Number of (undirected) Hamiltonian paths in the n-transposition graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TranspositionGraph.html">Transposition Graph</a>
%F a(n) = A276518(n)/2.
%Y Cf. A276518.
%K nonn,hard,more
%O 1,3
%A _Eric W. Weisstein_, May 07 2019