id:A124355 - OEIS Search Results

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Number of (directed) Hamiltonian cycles on the complete graph K_n.

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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 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`Eric Weisstein's World of Mathematics, Hamiltonian Circuit`
	FORMULA	`a(1) = 0, a(2) = 0, a(n) = (n-1)! otherwise`
	CROSSREFS	`Cf. A000142.` `Sequence in context: A155456 A000142 A104150 this_sequence A133942 A159333 A165233` `Adjacent sequences: A124352 A124353 A124354 this_sequence A124356 A124357 A124358`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com), Nov 05, 2006`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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