id:A090778 - OEIS Search Results

Search: id:A090778

Displaying 1-1 of 1 results found.

page 1

phi(n) divides n*(n-phi(n)).

+0
1

1, 2, 4, 6, 8, 10, 12, 16, 18, 20, 24, 32, 36, 40, 42, 48, 50, 54, 60, 64, 72, 80, 84, 96, 100, 108, 114, 120, 126, 128, 136, 144, 156, 160, 162, 168, 180, 192, 200, 216, 220, 228, 240, 250, 252, 256, 272, 288, 294, 300, 312, 320, 324, 336, 342, 360, 378, 384, 400 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) seems to be asymptotic to c*n^2 with c=0.11.....`
	CROSSREFS	`Sequence in context: A151999 A071594 A071596 this_sequence A097380 A114270 A085154` `Adjacent sequences: A090775 A090776 A090777 this_sequence A090779 A090780 A090781`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 08 2004`

page 1

Search completed in 0.002 seconds

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research