id:A069237 - OEIS Search Results

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Composite n such that tau(n) divides phi(n), where tau(n) is the number of divisors of n and phi(n) the Euler totient function.

+0
1

8, 9, 10, 15, 18, 21, 24, 26, 28, 30, 33, 34, 35, 39, 40, 45, 49, 51, 52, 55, 56, 57, 58, 63, 65, 69, 70, 72, 74, 76, 77, 78, 82, 84, 85, 87, 88, 90, 91, 93, 95, 98, 99, 102, 104, 105, 106, 108, 110, 111, 115, 117, 119, 120, 122, 123, 124, 125, 126, 128, 129, 130, 133 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Composite numbers in A003601(n)` `Sequence in context: A072381 A046415 A091417 this_sequence A070480 A135043 A054966` `Adjacent sequences: A069234 A069235 A069236 this_sequence A069238 A069239 A069240`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 13 2002`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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