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A155945 Numbers n such that 24*n + 13 is not prime. 1
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 (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:

*;

*,*;

*,*,*;

*,*,*,*;

*,*,*,*,*;

*,*,*,*,*,*;

*,*,*,*,*,*,*;

*,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

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Last modified November 26 21:15 EST 2022. Contains 358362 sequences. (Running on oeis4.)