A069639 - OEIS

This site is supported by donations to The OEIS Foundation.

A069639

Smallest composite k such that phi(k)>k*(1-1/n^2).

4, 25, 121, 289, 841, 1369, 2809, 4489, 6889, 10201, 16129, 22201, 29929, 38809, 51529, 66049, 85849, 109561, 134689, 160801, 196249, 237169, 292681, 332929, 398161, 458329, 537289, 619369, 727609, 822649, 935089, 1062961, 1190281 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`a(n)=nextprime(n^2)^2=A007918(n^2)^2`
	CROSSREFS	`Cf. A069549.` `Sequence in context: A070764 A110051 A013187 * A175733 A013582 A123660` `Adjacent sequences: A069636 A069637 A069638 * A069640 A069641 A069642`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 21 2002`

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

Last modified February 16 21:17 EST 2012. Contains 205971 sequences.