id:A023224 - OEIS Search Results

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Numbers n such that n and 7n + 4 both prime.

+0
3

7, 19, 37, 61, 79, 97, 139, 151, 157, 211, 229, 271, 307, 349, 379, 457, 487, 547, 571, 601, 607, 619, 631, 709, 751, 757, 769, 829, 877, 907, 937, 997, 1021, 1069, 1117, 1129, 1237, 1249, 1291, 1327, 1429, 1447, 1471, 1489, 1549, 1567, 1579, 1621, 1627, 1699 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`lst={}; Do[p=Prime[n]; If[PrimeQ[7*p+4], AppendTo[lst, p]], {n, 6!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 16 2009]`
	CROSSREFS	`Adjacent sequences: A023221 A023222 A023223 this_sequence A023225 A023226 A023227` `Sequence in context: A038847 A130056 A136057 this_sequence A113743 A003215 A133323`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.

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