id:A124486 - OEIS Search Results

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Numbers n such that 2n-1, 4n-1 and 6n-1 are primes.

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2, 3, 12, 15, 42, 45, 87, 117, 120, 147, 210, 330, 477, 507, 612, 705, 780, 792, 945, 1002, 1065, 1170, 1275, 1347, 1470, 1680, 1695, 1797, 1902, 2175, 2187, 2205, 2460, 2472, 2667, 3057, 3087, 4047, 4137, 4257, 4530, 4740, 4770, 5082, 5157, 5295, 5775 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[Range[6000], And @@ PrimeQ /@ ({2, 4, 6}# - 1) &] (Chandler*)`
	CROSSREFS	`Cf. A124485-A124492.` `Adjacent sequences: A124483 A124484 A124485 this_sequence A124487 A124488 A124489` `Sequence in context: A090512 A076175 A067780 this_sequence A123761 A047163 A046486`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Nov 04 2006`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 21 2006`

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

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