id:A018894 - OEIS Search Results

Search: id:A018894

Displaying 1-1 of 1 results found.

page 1

Numbers n such that sigma(n)/phi(n) sets a new record.

+0
6

2, 4, 6, 12, 24, 30, 60, 120, 180, 210, 360, 420, 840, 1260, 1680, 2520, 4620, 9240, 13860, 18480, 27720, 55440, 110880, 120120, 180180, 240240, 360360, 720720, 1441440, 2162160, 3603600, 4084080, 4324320, 6126120, 12252240, 24504480 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Remarkably similar to but ultimately different from A126098. - Jorg Brown and njas, Mar 06 2007`
	LINKS	`Jorg Brown, Comparison of records in sigma(n)/phi(n) and A018892`
	CROSSREFS	`Cf. A000203, A000010, A015702.` `Sequence in context: A066523 A097212 A126098 this_sequence A056795 A141420 A141551` `Adjacent sequences: A018891 A018892 A018893 this_sequence A018895 A018896 A018897`
	KEYWORD	`nonn`
	AUTHOR	`Michel ten Voorde (seqfan(AT)tenvoorde.org)`
	EXTENSIONS	`More terms from Jud McCranie (j.mccranie(AT)comcast.net), Nov 09 2001`

page 1

Search completed in 0.002 seconds

Last modified December 2 15:58 EST 2008. Contains 150992 sequences.

AT&T Labs Research