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A127487
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Primes p such that 6p-31 and 6p+31 all also primes.
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0
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2, 7, 13, 47, 113, 163, 167, 197, 233, 307, 317, 373, 547, 617, 797, 827, 863, 937, 1087, 1213, 1223, 1367, 1483, 1567, 1597, 1783, 1787, 2003, 2063, 2087, 2137, 2203, 2333, 2393, 2437, 2543, 2617, 2693, 2777, 2903, 3037, 3067, 3163, 3347, 3463, 3583, 3607
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 7, 6*7-31=11, 6*7+31=73 are all primes.
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MATHEMATICA
| Select[Range[8000], PrimeQ[ # ] && PrimeQ[6# + 31] && PrimeQ[6# - 31] &]
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PROG
| (MAGMA) [ p: p in PrimesUpTo(9000) | IsPrime(6*p-31) and IsPrime(6*p+31)] [From Vincenzo Librandi, Jan 29 2011]
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CROSSREFS
| Sequence in context: A129592 A153136 A178607 * A180003 A072060 A106912
Adjacent sequences: A127484 A127485 A127486 * A127488 A127489 A127490
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KEYWORD
| nonn
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AUTHOR
| Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 31 2007
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