id:A072611 - OEIS Search Results

Search: id:A072611

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Numbers n such that phi(n) divides sigma(n+1)-sigma(n).

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1, 2, 6, 14, 30, 40, 70, 140, 170, 174, 206, 215, 238, 390, 459, 518, 923, 957, 1334, 1364, 1540, 1634, 2685, 2974, 4364, 5180, 5934, 6048, 6467, 6510, 6623, 8028, 8094, 8260, 8814, 12136, 12954, 14099, 14841, 15416, 16472, 17094, 17835, 17927, 18873 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`Conjecture : lim n -> infinity Log(a(n))/Log(n) exists = 2, 6.......`
	CROSSREFS	`Sequence in context: A112511 A063452 A009299 this_sequence A000918 A095121 A122958` `Adjacent sequences: A072608 A072609 A072610 this_sequence A072612 A072613 A072614`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 07 2002`

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.

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