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 A107308 Numbers k such that (29*k - 31) is prime. 1
 12, 16, 18, 22, 30, 36, 40, 42, 46, 48, 60, 70, 82, 88, 90, 96, 102, 112, 118, 120, 126, 130, 132, 148, 156, 166, 172, 180, 190, 196, 198, 202, 228, 238, 246, 250, 256, 258, 268, 280, 282, 286, 300, 316, 330, 340, 342, 348, 352, 382, 390, 406, 408, 420, 426 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 29 and 31 are twin primes. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE If k=48, then 29*k - 31 = 1361 (prime). MATHEMATICA Select[Range[2, 500], PrimeQ[29#-31]&] (* Harvey P. Dale, Apr 22 2016 *) PROG (MAGMA) [n: n in [2..100000] | IsPrime(29*n - 31)]; // Vincenzo Librandi, Nov 13 2010 (PARI) is(n)=isprime((29*n-31)) \\ Charles R Greathouse IV, Jun 12 2017 CROSSREFS Cf. A142003 (the resulting primes). Sequence in context: A064499 A080258 A054290 * A051518 A043544 A097620 Adjacent sequences:  A107305 A107306 A107307 * A107309 A107310 A107311 KEYWORD nonn,easy AUTHOR Parthasarathy Nambi, May 20 2005 STATUS approved

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Last modified January 18 16:36 EST 2022. Contains 350455 sequences. (Running on oeis4.)