id:A124041 - OEIS Search Results

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

+0
7

9, 39, 165, 219, 249, 309, 414, 534, 639, 765, 1044, 1065, 1089, 1155, 1395, 1509, 1530, 1554, 1590, 1884, 2079, 2115, 2130, 2310, 2319, 2430, 2475, 2709, 2874, 3060, 3105, 3354, 3420, 3684, 3705, 3780, 3819, 4104, 4314, 4554, 4599, 4659, 4869, 5160 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[3Range[2000], And @@ PrimeQ /@ ({2, 4, 8}# + 1) &] (Chandler)`
	CROSSREFS	`Cf. A005097, A123998, A124412-A124417.` `Sequence in context: A034263 A060929 A124851 this_sequence A126396 A075210 A146187` `Adjacent sequences: A124038 A124039 A124040 this_sequence A124042 A124043 A124044`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Nov 02 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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