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A127453
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Primes p such that 6p-13 and 6p+13 all also primes.
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1
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3, 5, 11, 19, 31, 61, 79, 89, 101, 149, 179, 241, 269, 331, 409, 439, 479, 509, 599, 619, 691, 739, 751, 919, 971, 1031, 1039, 1061, 1171, 1201, 1249, 1319, 1451, 1531, 1571, 1741, 1871, 1879, 1999, 2161, 2221, 2389, 2459, 2531, 2609, 2819, 3061, 3301, 3391
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harvey P. Dale, Table of n, a(n) for n = 1..1000
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EXAMPLE
| 11, 6*11-13=53, 6*11+13=79 are all primes.
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MATHEMATICA
| Select[Range[5000], PrimeQ[ # ] && PrimeQ[6# + 13] && PrimeQ[6# - 13] &]
okQ[n_]:=Module[{n6=6n}, And@@PrimeQ[{6n+13, 6n-13}]]; Select[Prime[Range[ 500]], okQ] (* From Harvey P. Dale, Oct 03 2011 *)
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PROG
| (MAGMA) [ p: p in PrimesUpTo(9000) | IsPrime(6*p-13) and IsPrime(6*p+13)] [From Vincenzo Librandi, Jan 29 2011]
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CROSSREFS
| Sequence in context: A007671 A090471 A124098 * A092602 A134127 A175783
Adjacent sequences: A127450 A127451 A127452 * A127454 A127455 A127456
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KEYWORD
| nonn
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AUTHOR
| Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 31 2007
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