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%I #20 Feb 17 2021 14:31:29
%S 1,4,144,4016,152230,14557092,1966154260,761411682704,411068703517542,
%T 684434716944151900,1572754514153890134760,11579615738168536799184984,
%U 117186519917858266359631481672,3877921919790491112398750141807648,176258463464553583688099296874564393850,26493868301658838913487471166447301509560736
%N Number of Hamiltonian paths in C_n X P_n.
%C This is the number of undirected paths.
%H Artem M. Karavaev, <a href="https://web.archive.org/web/20161015205133/http://flowproblem.ru/paths/hamilton-paths">Hamilton Paths</a>
%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/StackedPrismGraph.html">Stacked Prism Graph</a>
%Y Cf. A003763, A222197, A120443, A268838.
%Y Cf. A003752, A003732.
%K nonn
%O 1,2
%A _Andrew Howroyd_, Feb 15 2016
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