

A234365


Number of directed Hamiltonian cycles in the complete tripartite graph K_{n,n,n}.


3



2, 32, 3168, 926208, 598579200, 723105792000, 1464887918592000, 4610898301943808000, 21308780838537658368000, 138404291567096011161600000, 1220304754650628950589440000000, 14197926030549494380143575040000000, 212919452788134597593544586690560000000, 4034887005978635554837074343530332160000000
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OFFSET

1,1


LINKS



FORMULA



MATHEMATICA

Table[n!^2 (n  1)! 2^n HypergeometricPFQ[{n, (1  n)/2, n/2}, {1, 1}, 1], {n, 10}] (* Eric W. Weisstein, Apr 26, 2017 *)


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



