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A023218
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Numbers n such that n and 5n + 4 both prime.
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10
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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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]
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PROG
| (MAGMA) [n: n in [0..1000] | IsPrime(n) and IsPrime(5*n+4)] [From V. Librandi, Nov 20 2010]
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CROSSREFS
| Sequence in context: A096292 A181747 A078864 * A073022 A129694 A147015
Adjacent sequences: A023215 A023216 A023217 * A023219 A023220 A023221
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KEYWORD
| nonn
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AUTHOR
| David W. Wilson (davidwwilson(AT)comcast.net)
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