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A124355
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Number of (directed) Hamiltonian cycles on the complete graph K_n.
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1
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0, 0, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916800, 479001600, 6227020800, 87178291200, 1307674368000, 20922789888000, 355687428096000, 6402373705728000, 121645100408832000, 2432902008176640000
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OFFSET
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1,3
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COMMENTS
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a(n) is also the number of (directed) Hamiltonian paths on the complete graph K_{n-1}.
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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