id:A034381 - OEIS Search Results

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Number of labeled cyclic groups.

+0
4

1, 2, 3, 12, 30, 360, 840, 10080, 60480, 907200, 3991680, 119750400, 518918400, 14529715200, 163459296000, 2615348736000, 22230464256000, 1067062284288000, 6758061133824000, 304112751022080000 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Index entries for sequences related to enumerating groups.`
	FORMULA	`n!/phi(n).`
	CROSSREFS	`a(n)=A000142(n)/A000010(n)=A058161(n)*n. Cf. A034382, A034383.` `Sequence in context: A109489 A105401 A073617 this_sequence A076424 A165301 A072440` `Adjacent sequences: A034378 A034379 A034380 this_sequence A034382 A034383 A034384`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net)`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research