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A158017
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Primes p such that 10*p-1 is also prime.
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2
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2, 3, 11, 23, 41, 71, 83, 101, 107, 113, 149, 167, 179, 227, 239, 269, 311, 317, 347, 353, 389, 479, 491, 521, 557, 569, 587, 647, 653, 683, 809, 821, 827, 839, 863, 911, 977, 983, 1091, 1229, 1259, 1283, 1289, 1301, 1367, 1373, 1439, 1487, 1493, 1607, 1619
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The family of prime sequences that generate primes k*p-1 for k = 2, 4, 6, 8,... comprises also
A005382 (k=2), A062737 (k=4), A158015 (k=6), and A158016 (k=8).
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MATHEMATICA
| Flatten[Table[If[PrimeQ[n] && PrimeQ[10*n - 1], n, {}], {n, 1, 10000}]]
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PROG
| (MAGMA) [p: p in PrimesUpTo(3000)|IsPrime(10*p-1)] [From Vincenzo Librandi, Jan 29 2011]
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CROSSREFS
| Cf. A005382, A062737
Sequence in context: A080153 A040124 A082739 * A091310 A040994 A141123
Adjacent sequences: A158014 A158015 A158016 * A158018 A158019 A158020
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KEYWORD
| nonn
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AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Mar 11 2009
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