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 A153307 Numbers n such that 14*n+3 is not prime. 1
 3, 6, 8, 9, 10, 12, 13, 15, 18, 21, 23, 24, 27, 28, 30, 31, 32, 33, 35, 36, 38, 39, 42, 43, 45, 48, 49, 50, 51, 52, 53, 54, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 72, 73, 75, 76, 77, 78, 81, 83, 84, 86, 87, 88, 90 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE Distribution of the terms in the following triangular array: *; *,*; *,*,*; *,3,*,*; *,*,*,*,*; *,*,*,*,10,*; 3,*,*,*,*,*,*; *,*,*,*,*,*,18,*; *,*,*,12,*,*,*,*,*; *,*,*,*,*,*,*,*,*,*; *,8,*,*,*,*,*,*,31,*,*; *,*,*,*,*,23,*,*,*,*,*; *,*,*,*,21,*,*,*,*,*,*,48,*;etc. where * marks the non-integer values of (2*h*k + k + h - 1)/7 with h >= k >= 1. - Vincenzo Librandi, Jan 17 2013 MATHEMATICA Select[Range[0, 200], !PrimeQ[14*# + 3]&] (* Vincenzo Librandi, Jan 12 2013 *) PROG (MAGMA) [n: n in [0..150] | not IsPrime(14*n + 3)]; // Vincenzo Librandi, Jan 12 2013 CROSSREFS Sequence in context: A188544 A163463 A137386 * A265227 A201817 A299240 Adjacent sequences:  A153304 A153305 A153306 * A153308 A153309 A153310 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Dec 23 2008 STATUS approved

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Last modified May 16 19:46 EDT 2021. Contains 343951 sequences. (Running on oeis4.)