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 A157043 Primes p such that 6p-7, 6p-5, 6p-3, 6p-1 are not prime. 2
 37, 89, 131, 151, 181, 191, 223, 233, 257, 281, 307, 367, 419, 461, 479, 499, 541, 547, 557, 571, 601, 641, 661, 673, 719, 739, 751, 757, 769, 797, 809, 839, 857, 887, 911, 937, 947, 1031, 1069, 1091, 1103, 1129, 1201, 1213, 1231, 1277, 1297, 1301, 1327 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE For p=37, (215,217,219,221 are not prime); p=89, (527,529,531,533 are not prime); p=131, (779,781,783,785 are not prime). MATHEMATICA Select[ Prime@ Range@ 200, !PrimeQ[6 # - 1] && !PrimeQ[6 # - 3] && !PrimeQ[6 # - 5] && !PrimeQ[6 # - 7] &] (* Robert G. Wilson v, Apr 08 2009 *) CROSSREFS Cf. A157042. Sequence in context: A044556 A330362 A285803 * A246930 A142525 A132360 Adjacent sequences:  A157040 A157041 A157042 * A157044 A157045 A157046 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Feb 22 2009 EXTENSIONS More terms from Robert G. Wilson v, Apr 08 2009 STATUS approved

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Last modified April 8 21:44 EDT 2020. Contains 333329 sequences. (Running on oeis4.)