id:A086502 - OEIS Search Results

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Number of ordered pairs (a,b) of elements of the symmetric group S_n such that the pair a,b generates a proper subgroup of S_n.

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0, 1, 18, 360, 7560, 289440, 9828000, 631169280, 46449002880 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n) = n!^2 - A071605(n).`
	CROSSREFS	`Cf. A071605.` `Sequence in context: A068771 A039646 A127585 this_sequence A099276 A070943 A111454` `Adjacent sequences: A086499 A086500 A086501 this_sequence A086503 A086504 A086505`
	KEYWORD	`nonn`
	AUTHOR	`Yuval Dekel (dekelyuval(AT)hotmail.com), Sep 09 2003`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.