id:A107438 - OEIS Search Results

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Primes p such that 7*p+2 or 2*p+7 is prime.

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2, 3, 5, 11, 17, 23, 41, 47, 53, 71, 83, 101, 107, 113, 131, 137, 167, 173, 191, 197, 227, 251, 257, 281, 293, 311, 317, 347, 353, 383, 401, 431, 461, 467, 503, 521, 563, 587, 593, 641, 647, 677, 683, 701, 743, 773, 797, 821, 827, 857, 863, 887, 911, 941, 947 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Cf. A105760 Numbers n such that (2n + 7) is prime; A105772 Numbers n such that (7n + 2) is prime`
	MATHEMATICA	`Select[Prime[Range[220]], PrimeQ[2#+7]&&PrimeQ[7#+2]&]` `Select[Prime[Range[220]], PrimeQ[2#+7]\|\|PrimeQ[7#+2]&] (Shepherd)`
	CROSSREFS	`Cf. A105760, A105772.` `Sequence in context: A113239 A049553 A049595 this_sequence A023206 A049565 A094480` `Adjacent sequences: A107435 A107436 A107437 this_sequence A107439 A107440 A107441`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), May 26 2005`
	EXTENSIONS	`Edited by Rick L. Shepherd (rshepherd2(AT)hotmail.com), Feb 01 2006`

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

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