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 A171139 Primes p such that 7*p^2+7*p-1 is also prime. 5
 2, 3, 17, 19, 23, 29, 47, 67, 73, 97, 113, 151, 163, 173, 223, 227, 229, 239, 251, 257, 263, 311, 331, 359, 367, 373, 389, 409, 419, 433, 439, 457, 463, 491, 503, 523, 541, 563, 569, 607, 701, 733, 809, 853, 877, 883, 941, 953, 967, 983, 1013, 1033, 1049 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Prime[Range[200]], PrimeQ[7 #^2 + 7 # - 1]&] (* Vincenzo Librandi, Apr 16 2013 *) PROG (Magma) [p: p in PrimesUpTo(1050) | IsPrime(7*p^2+7*p-1)]; // Vincenzo Librandi, Apr 16 2013 CROSSREFS Cf. A171138. Sequence in context: A361104 A090913 A176236 * A291281 A135931 A215323 Adjacent sequences: A171136 A171137 A171138 * A171140 A171141 A171142 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Jan 26 2010 STATUS approved

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Last modified November 30 23:40 EST 2023. Contains 367464 sequences. (Running on oeis4.)