id:A066052 - OEIS Search Results

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Number of permutations in the symmetric group S_n with order >= 3.

+0
2

0, 0, 2, 14, 94, 644, 4808, 39556, 360260, 3619304, 39881104, 478861448, 6226452296, 87175900720, 1307664018464, 20922743681264, 355687216296688, 6402372708414176, 121645095599130560, 2432901984417975904, 51090942051756747104, 1124000727158723041088, 25852016735627132757376 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Permutations which contain a cycle with length >=3.`
	FORMULA	`a(n) = n! - A000085(n)` `E.g.f.: 1/(1-x)-exp(x*(x+2)/2).`
	CROSSREFS	`Cf. A000085, A000142.` `Sequence in context: A072148 A033169 A090410 this_sequence A122057 A164891 A141146` `Adjacent sequences: A066049 A066050 A066051 this_sequence A066053 A066054 A066055`
	KEYWORD	`nonn,easy`
	AUTHOR	`Sharon Sela (sharonsela(AT)hotmail.com), Dec 29 2001`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Dec 31 2001`

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Last modified March 20 09:10 EDT 2010. Contains 173642 sequences.

AT&T Labs Research