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%I #20 Jun 26 2023 06:32:33
%S 20,390,2930,23580,145210,1045940,6228730,43322370,260600210,
%T 1776654220,10913989610,73525916750,461264468640,3088176680560,
%U 19722405442490,131703577902460,853035459491710,5693694272274220,37271158654667390,248902943147007900
%N Number of Hamiltonian cycles in C_5 X C_n.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HamiltonianCycle.html">Hamiltonian Cycle</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TorusGridGraph.html">Torus Grid Graph</a>
%Y Row 5 of A270273.
%Y Cf. A222199.
%K nonn
%O 2,1
%A _Seiichi Manyama_, Dec 03 2022
%E More terms from _Ed Wynn_, Jun 25 2023
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