id:A116025 - OEIS Search Results

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sigma(n) plus n gives a semiprime (A001358).

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7, 9, 14, 15, 17, 18, 19, 20, 22, 32, 39, 43, 45, 46, 47, 49, 50, 51, 59, 61, 62, 68, 70, 71, 72, 79, 81, 86, 91, 93, 95, 101, 104, 107, 109, 110, 115, 116, 117, 118, 121, 123, 129, 130, 142, 149, 151, 158, 160, 163, 164, 165, 167, 177, 185, 187, 197, 201, 207 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`sigma(101)+101=203=7*29.`
	CROSSREFS	`Cf. A001358, A116014.` `Adjacent sequences: A116022 A116023 A116024 this_sequence A116026 A116027 A116028` `Sequence in context: A032487 A063189 A004472 this_sequence A020939 A073457 A047522`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006`

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Last modified October 13 17:46 EDT 2008. Contains 145008 sequences.

AT&T Labs Research