id:A067134 - OEIS Search Results

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Numbers n such that sigma(n+1)=2*sigma(n-1).

+0
2

119, 1559, 2939, 17759, 19919, 32219, 33839, 55964, 71039, 186779, 308039, 511499, 523775, 553499, 699359, 838214, 1048904, 1159379, 1328939, 1333247, 1700039, 2462687, 2703887, 2956079, 3115319, 3561095, 3764207, 3972695 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`For each term given here, n+1 is divisible by 3, but that's not always true; n=12396999 is a counterexample.`
	CROSSREFS	`Cf. A055574, A067135.` `Sequence in context: A106572 A116485 A126563 this_sequence A048397 A020529 A069328` `Adjacent sequences: A067131 A067132 A067133 this_sequence A067135 A067136 A067137`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 18 2002`
	EXTENSIONS	`Edited by Dean Hickerson (dean(AT)math.ucdavis.edu), Feb 20 2002`

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

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