id:A069639 - OEIS Search Results

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

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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; listen)

	OFFSET	`1,1`
	FORMULA	`a(n)=nextprime(n^2)^2=A007918(n^2)^2`
	CROSSREFS	`Cf. A069549.` `Sequence in context: A070764 A110051 A013187 this_sequence A013582 A123660 A015533` `Adjacent sequences: A069636 A069637 A069638 this_sequence A069640 A069641 A069642`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 21 2002`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research