id:A023218 - OEIS Search Results

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Numbers n such that n and 5n + 4 both prime.

+0
11

3, 5, 11, 17, 29, 47, 53, 71, 83, 89, 101, 113, 131, 167, 251, 257, 263, 281, 311, 389, 419, 461, 467, 479, 491, 509, 521, 557, 563, 587, 593, 599, 617, 641, 659, 677, 743, 797, 809, 827, 857, 881, 929, 977, 983, 1019, 1061, 1103, 1187, 1217, 1259, 1277, 1289, 1319 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`lst={}; Do[If[PrimeQ[n]&&PrimeQ[5*n+4], AppendTo[lst, n]], {n, 13^3}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 08 2008]`
	CROSSREFS	`Sequence in context: A001359 A096292 A078864 this_sequence A073022 A129694 A147015` `Adjacent sequences: A023215 A023216 A023217 this_sequence A023219 A023220 A023221`
	KEYWORD	`nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

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