id:A124487 - OEIS Search Results

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Numbers n such that 2n-1, 4n-1, 6n-1 and 8n-1 are primes.

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3, 45, 705, 945, 5295, 5775, 5955, 6450, 8580, 9945, 11175, 12120, 13095, 18000, 18525, 18690, 19710, 22440, 22785, 24960, 30390, 33780, 34335, 37665, 41790, 44460, 52185, 54180, 56175, 57300, 63570, 66990, 67515, 67725, 73335, 74700 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[Range[80000], And @@ PrimeQ /@ ({2, 4, 6, 8}# - 1) &] (Chandler*)`
	CROSSREFS	`Cf. A124485-A124492.` `Sequence in context: A141445 A076140 A131568 this_sequence A132303 A008931 A036278` `Adjacent sequences: A124484 A124485 A124486 this_sequence A124488 A124489 A124490`
	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 November 30 13:13 EST 2009. Contains 167758 sequences.

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