A189242 Numbers n such that 24*n+17 is not prime.

2, 6, 7, 8, 12, 13, 15, 17, 19, 20, 22, 27, 28, 29, 30, 32, 34, 37, 41, 42, 44, 46, 47, 48, 51, 52, 54, 55, 57, 60, 62, 63, 65, 67, 68, 69, 72, 73, 74, 75, 76, 77, 80, 81, 82, 83, 84, 85, 87, 90, 91, 92, 93, 96, 97, 98, 102, 103, 104, 105, 106, 107, 111, 112, 117, 118

Offset: 1

Author

Vincenzo Librandi, Apr 19 2011

Keywords

• nonn
• easy

Examples

			Distribution of the terms in the following triangular array:
*;
*,*;
*,*,*;
*,*,*,*;
*,*,*,*,*;
*,2,*,*,*,*;
*,*,*,*,*,*,*;
*,*,*,*,*,*,*,*;
*,*,*,*,8,*,*,*,*;
*,*,*,*,*,*,*,*,*,*;
*,*,6,*,*,*,*,*,*,*,*;
*,*,*,*,*,*,*,17,*,*,*,*; etc.
where * marks the non-integer values of (2*h*k + k + h - 8)/12 with h >= k >= 1. - _Vincenzo Librandi_, Jan 15 2013
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A139531, A107181.

Programs

Magma

[n: n in [0..200] | not IsPrime(24*n+17)]; // Vincenzo Librandi, Apr 19 2011

Mathematica

Select[Range[1,300],!PrimeQ[24 # + 17] &] (* Vincenzo Librandi, Aug 05 2012 *)