id:A015756 - OEIS Search Results

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Least k congruent n such that phi(n) | sigma(n).

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1, 2, 3, 12, 15, 6, 14, 56, 270, 30, 264, 12, 78, 14, 15, 4064, 357, 270, 190, 140, 42, 264, 3056, 168, 27000, 78, 270, 56, 812, 30, 248, 4064, 264, 714, 35, 2376, 56536, 190, 78, 840, 2214, 42, 2580, 264, 270, 3956, 2109548, 12192, 56252, 27000, 357 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A024579 A068603 A045878 this_sequence A090512 A076175 A067780` `Adjacent sequences: A015753 A015754 A015755 this_sequence A015757 A015758 A015759`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com)`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research