A166570 Numbers n such that 12*n+11 is not prime.

2, 7, 9, 11, 12, 16, 17, 22, 23, 24, 26, 27, 30, 32, 33, 37, 42, 43, 44, 45, 47, 50, 51, 52, 55, 57, 58, 60, 62, 63, 64, 65, 66, 67, 70, 72, 74, 76, 77, 79, 82, 83, 86, 87, 88, 89, 92, 93, 94, 97, 99, 100, 102, 103, 105, 107, 110, 111, 112, 114, 115, 116, 117, 121, 122

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:
*;
*,*;
*,2,*;
*,*,*,*;
*,*,*,*,*;
*,*,*,*,11,*;
*,*,*,*,*,*,*;
*,*,9,*,*,*,*,*;
*,7,*,*,*,*,*,26,*;
*,*,*,*,*,*,*,*,*,*;
*,*,*,*,*,24,*,*,*,*,*;
*,*,*,*,22,*,*,*,*,*,47,*; etc.
where * marks the non-integer values of (2*h*k + k + h - 5)/6 with h >= k >= 1. -

Mathematica

Select[Range[0, 200], !PrimeQ[12 # + 11] &] (* Vincenzo Librandi, Jan 14 2013 *)

Prog

(Magma) [n: n in [0..150] | not IsPrime(12*n+11)]; // Vincenzo Librandi, Jan 14 2013

Crossrefs

Cf. A167057.

Sequence in context: A034796 A047526 A221280 * A003668 A191263 A287359

Adjacent sequences: A166567 A166568 A166569 * A166571 A166572 A166573

Keyword

nonn,easy

Author

Vincenzo Librandi, Oct 29 2009

Status

approved