id:A139402 - OEIS Search Results

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Prime numbers k such that 8k+1 and 8k+3 are also primes.

+0
7

2, 5, 17, 71, 101, 107, 131, 491, 677, 761, 821, 1307, 1361, 1367, 1667, 2081, 2207, 2837, 3461, 3467, 3761, 3767, 4007, 5087, 5147, 5231, 5381, 5927, 6701, 6737, 6917, 6977, 8447, 8741, 8807, 9011, 9341, 9677, 9767 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`a = {}; Do[If[PrimeQ[8 n + 1] && PrimeQ[8 n + 3] && PrimeQ[n], AppendTo[a, n]], {n, 1, 10000}]; a`
	CROSSREFS	`Cf. A125822.` `Adjacent sequences: A139399 A139400 A139401 this_sequence A139403 A139404 A139405` `Sequence in context: A027361 A101971 A049774 this_sequence A143382 A057219 A084869`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Apr 19 2008`

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

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