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 A023222 Primes p such that 6*p + 7 is also prime. 4
 2, 5, 11, 17, 29, 31, 37, 61, 67, 71, 89, 101, 109, 127, 137, 167, 181, 191, 199, 229, 241, 257, 269, 277, 281, 311, 331, 337, 347, 359, 379, 389, 397, 419, 431, 457, 491, 499, 509, 541, 571, 577, 587, 601, 617, 631, 641, 647, 691, 709, 739, 751, 757, 769, 787, 797, 809 (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[6#+7]&] (* Harvey P. Dale, Nov 25 2012 *) PROG (Magma) [n: n in PrimesUpTo(900) | IsPrime(6*n+7)]; // Vincenzo Librandi, Nov 19 2010 (PARI) is(n)=isprime(6*n+7) && isprime(n) \\ Charles R Greathouse IV, Apr 18 2020 CROSSREFS Intersection of A153218 and A000040. Cf. A153219. Sequence in context: A038390 A048210 A153222 * A289250 A278049 A007491 Adjacent sequences: A023219 A023220 A023221 * A023223 A023224 A023225 KEYWORD nonn,easy AUTHOR David W. Wilson STATUS approved

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Last modified May 18 13:40 EDT 2024. Contains 372630 sequences. (Running on oeis4.)