id:A074759 - OEIS Search Results

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Number of degree-n permutations of order dividing n. Number of solutions to x^n = 1 in S_n.

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1, 2, 3, 16, 25, 396, 721, 11264, 46089, 602200, 3628801, 133494912, 479001601, 7692266960, 95904273375, 1914926104576, 20922789888001, 628693317946656, 6402373705728001, 182635841123840000, 2496321046987530021 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = n!*coefficient of x^n in expansion of exp(Sum_{k divides n} x^k/k).`
	CROSSREFS	`Cf. A074351.` `Sequence in context: A092503 A147662 A074182 this_sequence A102882 A085734 A034382` `Adjacent sequences: A074756 A074757 A074758 this_sequence A074760 A074761 A074762`
	KEYWORD	`easy,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 28 2002`

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

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