A066986 - OEIS

This site is supported by donations to The OEIS Foundation.

A066986

Integers of the form prod(i=1,n, sigma(i))/prod(i=1,n,phi(i))=A001088(n)/A066780(n).

1, 3, 6, 21, 189, 252, 945, 361179, 1083537 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	CROSSREFS	`Sequence in context: A032098 A019053 A019054 * A096662 A054297 A079514` `Adjacent sequences: A066983 A066984 A066985 * A066987 A066988 A066989`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 27 2002`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 08:49 EST 2012. Contains 205740 sequences.