A153264 Numbers n such that 16*n+15 is not prime.

0, 3, 5, 6, 8, 9, 10, 12, 15, 17, 18, 19, 20, 21, 24, 25, 27, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 41, 42, 43, 45, 47, 48, 49, 50, 51, 52, 54, 55, 57, 58, 59, 60, 62, 63, 65, 66, 69, 70, 72, 73, 74, 75, 77, 78, 80, 81, 83, 84, 85, 86, 87, 90, 93, 94, 95, 96, 99

Offset

1,2

Links

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

Example

Distribution of the terms in the following triangular array:
*;
0,*;
*,*,*;
*,*,3,*;
*,*,*,*,*;
*,*,*,*,8,*;
*,*,*,*,*,*,*;
*,*,*,*,*,*,15,*;
*,5,*,*,*,*,*,*,*;
3,*,*,*,*,*,*,*,24,*;
*,*,*,12,*,*,*,*,*,*,*;
*,*,10,*,*,*,*,*,*,*,35,*; etc.
where * marks the non-integer values of (2*h*k + k + h - 7)/8 with h >= k >= 1. - Vincenzo Librandi, Jan 15 2013

Mathematica

Select[Range[0, 200], !PrimeQ[16 # + 15] &] (* Vincenzo Librandi, Jan 12 2013 *)

Prog

(Magma) [n: n in [0..150] | not IsPrime(16*n+15)]; // Vincenzo Librandi, Jan 12 2013

Crossrefs

Cf. A127575.

Sequence in context: A307206 A026430 A002150 * A249595 A133561 A095117

Adjacent sequences: A153261 A153262 A153263 * A153265 A153266 A153267

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 22 2008

Extensions

0 added by Arkadiusz Wesolowski, Aug 03 2011

Status

approved