%I #7 Feb 16 2025 08:33:55
%S 3,120,18792,7547904,6210432000,9116955648000,21746167511040000,
%T 78775578609057792000,411821286886186942464000,
%U 2985318922218593845248000000,29060162328471184917135360000000,369984034079871408445744742400000000
%N Numbers of (undirected) Hamiltonian paths in the complete tripartite graph K_{n,n,n}.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/CompleteTripartiteGraph.html">Complete Tripartite Graph</a>
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a>
%F a(n) = A234633(n)/2.
%Y Cf. A234633.
%K nonn,changed
%O 1,1
%A _Eric W. Weisstein_, May 06 2019