id:A130699 - OEIS Search Results

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Numbers n for which neither 2n-3 nor 2n+3 are primes.

+0
2

6, 9, 12, 15, 18, 21, 26, 27, 30, 33, 36, 39, 42, 44, 45, 48, 51, 54, 57, 59, 60, 61, 63, 66, 69, 72, 75, 78, 79, 81, 84, 86, 87, 90, 93, 96, 99, 102, 103, 105, 106, 108, 109, 111, 114, 117, 120, 123, 125, 126, 128, 129, 131, 132, 135, 138, 141, 144, 146 (list; graph; listen)

	OFFSET	`2,1`
	EXAMPLE	`Not 5 because 7 and 13 are prime, but 6 because neither 9 nor 15 are primes.`
	CROSSREFS	`Cf. A104278.` `Adjacent sequences: A130696 A130697 A130698 this_sequence A130700 A130701 A130702` `Sequence in context: A099862 A014407 A100352 this_sequence A023040 A001474 A084806`
	KEYWORD	`easy,nonn`
	AUTHOR	`Neville Holmes (neville.holmes(AT)utas.edu.au), Jul 11 2007`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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