id:A069043 - OEIS Search Results

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Composite numbers with no prime factor among (2;3) (cf. A038509) and such that phi(n)<2*n/3.

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385, 455, 595, 665, 805, 1015, 1085, 1925, 2275, 2695, 2975, 3185, 3325, 4025, 4165, 4235, 4655, 5005, 5075, 5425, 5635, 5915, 6545, 7105, 7315, 7595, 7735, 8645, 8855, 9625, 10115, 10465, 11165, 11305, 11375, 11935, 12155, 12635, 13195, 13475 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Almost composite numbers such that phi(n)>2n/3 have also no smallest prime factor among 2 and 3.`
	FORMULA	`Sequence gives k in A038509(n) but not in A067793(n)`
	CROSSREFS	`Adjacent sequences: A069040 A069041 A069042 this_sequence A069044 A069045 A069046` `Sequence in context: A008692 A067518 A071763 this_sequence A013591 A065110 A063390`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 03 2002`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

AT&T Labs Research