A155945 Numbers n such that 24*n + 13 is not prime.

3, 5, 8, 10, 12, 13, 18, 19, 20, 21, 23, 24, 26, 28, 32, 33, 37, 38, 39, 40, 43, 47, 48, 49, 52, 53, 54, 55, 56, 58, 61, 62, 63, 65, 68, 71, 73, 75, 76, 78, 79, 81, 82, 83, 86, 87, 88, 89, 90, 91, 93, 96, 98, 100

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,*,*,*,*,*,*;
*,*,5,*,*,*,*,*,*;
*,*,*,*,*,*,*,*,*,*;
*,*,*,*,10,*,*,*,*,*,*;
*,*,*,*,*,13,*,*,*,*,*,*; etc.
where * marks the non-integer values of (2*h*k + k + h - 6)/12 with h >= k >= 1. - Vincenzo Librandi, Jan 15 2013

Mathematica

Select[Range[0, 100], !PrimeQ[24 # + 13] &] (* Vincenzo Librandi, Oct 15 2012 *)

Prog

(Magma) [n: n in [0..100] |not IsPrime(24*n + 13)]; // Vincenzo Librandi, Oct 15 2012

Crossrefs

Cf. A139529, A139530.

Sequence in context: A282897 A189377 A073608 * A096985 A206909 A138829

Adjacent sequences: A155942 A155943 A155944 * A155946 A155947 A155948

Keyword

nonn,easy

Author

Vincenzo Librandi, Jan 31 2009

Status

approved