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 A033868 Numbers n such that 7*n-11 is prime. 9
 2, 4, 6, 10, 12, 16, 24, 30, 34, 36, 40, 42, 46, 52, 54, 60, 70, 76, 82, 84, 90, 94, 96, 112, 114, 120, 124, 136, 142, 144, 150, 160, 162, 166, 172, 180, 184, 186, 190, 196, 210, 214, 222, 226, 232, 234, 240, 244, 252, 262, 270, 274, 280, 300, 306, 322, 336, 342 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988 Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 FORMULA a(n) = A024903(n)+1 = A089033(n)+2 = A090614(n)*2+2. MATHEMATICA Select[Range[500], PrimeQ[7#-11]&]  (* Harvey P. Dale, Mar 31 2011 *) PROG (MAGMA) [n: n in [0..350] | IsPrime(7*n - 11)]; // Vincenzo Librandi, Sep 26 2012 (PARI) is(n)=isprime(7*n-11) \\ Charles R Greathouse IV, Feb 17 2017 CROSSREFS Cf. A045437 (associated primes), A090613 (gives prime index). Cf. A024903, A089033, A090614. Sequence in context: A024907 A033098 A220478 * A045954 A072542 A167856 Adjacent sequences:  A033865 A033866 A033867 * A033869 A033870 A033871 KEYWORD nonn,easy AUTHOR Giovanni Teofilatto, Dec 01 2003 EXTENSIONS Extended by Ray Chandler, Dec 23 2003 Offset corrected by Arkadiusz Wesolowski, Aug 09 2011 STATUS approved

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Last modified March 26 18:36 EDT 2019. Contains 321511 sequences. (Running on oeis4.)