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A166570 Numbers n such that 12*n+11 is not prime. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 22 14:26 EDT 2020. Contains 337291 sequences. (Running on oeis4.)