id:A068422 - OEIS Search Results

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Numbers n such that (n-phi(n)) divides sigma(n).

+0
2

2, 3, 5, 6, 7, 10, 11, 13, 14, 17, 19, 22, 23, 26, 29, 31, 34, 37, 38, 41, 43, 46, 47, 53, 58, 59, 61, 62, 67, 71, 73, 74, 79, 82, 83, 86, 89, 94, 97, 99, 101, 103, 106, 107, 109, 113, 118, 122, 127, 131, 134, 137, 139, 142, 146, 149, 151, 157, 158, 163, 166, 167, 168 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`If p is an odd prime, p and 2*p are in the sequence but there are some others kind of numbers as 99 or 168.`
	CROSSREFS	`Sequence in context: A003754 A087006 A144147 this_sequence A085118 A166158 A137313` `Adjacent sequences: A068419 A068420 A068421 this_sequence A068423 A068424 A068425`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 02 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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