id:A079860 - OEIS Search Results

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Commuting permutations: number of ordered triples f, g, h in Symm(n) which all commute, divided by n!.

+0
4

1, 4, 8, 21, 39, 92, 170 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Conjecture: a(n) = A061256(n). - Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Jan 16 2006.`
	REFERENCES	`Computed by John McKay, Sep 06 2003`
	CROSSREFS	`Cf. A072169/n!, A053529.` `Adjacent sequences: A079857 A079858 A079859 this_sequence A079861 A079862 A079863` `Sequence in context: A102559 A037020 A094878 this_sequence A006908 A061256 A097076`
	KEYWORD	`nonn,more`
	AUTHOR	`njas, Sep 06 2003`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.