id:A105549 - OEIS Search Results

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Numbers n such that 2*prime(n)+/-n are primes.

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1, 3, 15, 27, 33, 45, 81, 189, 213, 243, 249, 279, 285, 291, 381, 423, 567, 615, 675, 687, 705, 813, 819, 1023, 1071, 1077, 1137, 1173, 1347, 1425, 1431, 1503, 1737, 1779, 1785, 1815, 1857, 1989, 1995, 2049, 2067, 2163, 2241, 2373, 2565, 2841 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`bb={}; Do[If[PrimeQ[2 Prime[n]+n]&&PrimeQ[2 Prime[n]-n], bb=Append[bb, n]], {n, 1, 3000, 2}]; bb`
	CROSSREFS	`Sequence in context: A006872 A027179 A121250 this_sequence A080065 A017557 A002259` `Adjacent sequences: A105546 A105547 A105548 this_sequence A105550 A105551 A105552`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), May 03 2005`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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