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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
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: A137386 A358510 A344952 * A265227 A201817 A299240
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 23 2008
STATUS
approved

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Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)