A153307 Numbers n such that 14*n+3 is not prime.

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

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

A090614.

Sequence in context: A137386 A358510 A344952 * A265227 A201817 A299240

Adjacent sequences: A153304 A153305 A153306 * A153308 A153309 A153310

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 23 2008

Status

approved