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A127331 Primes p such that 6p-7 and 6p+7 are also primes. 0
2, 5, 11, 29, 31, 61, 71, 101, 109, 199, 229, 241, 269, 331, 379, 431, 491, 631, 691, 821, 919, 941, 991, 1049, 1061, 1259, 1289, 1321, 1409, 1439, 1451, 1459, 1571, 1621, 1831, 1861, 1931, 2039, 2089, 2161, 2251, 2281, 2311, 2389, 2399, 2441, 2539, 2551 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

31, 6*31-7=179, 6*31+7=193 are all primes.

MATHEMATICA

Select[Range[5000], PrimeQ[ # ] && PrimeQ[6# + 7] && PrimeQ[6# - 7] &]

CROSSREFS

Sequence in context: A121398 A000625 A202476 * A040998 A117719 A192785

Adjacent sequences:  A127328 A127329 A127330 * A127332 A127333 A127334

KEYWORD

nonn

AUTHOR

Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 30 2007

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Last modified February 16 06:08 EST 2012. Contains 205860 sequences.