A138620 - OEIS

%I #14 Dec 09 2019 08:18:13

%S 1,2,4,5,6,7,9,11,14,15,16,19,20,21,22,26,29,30,32,35,36,37,39,40,41,

%T 42,47,49,50,54,55,57,60,62,69,70,72,74,76,79,81,82,85,86,91,92,96,97,

%U 99,102,105,107,109,110,114,119,120,121,124,125,126,127,130

%N Nonnegative integers n such that 12*n-1 is prime.

%H Daniel Starodubtsev, <a href="/A138620/b138620.txt">Table of n, a(n) for n = 1..10000</a>

%e 12*1-1=11, 12*2-1=23, 12*4-1=47, 12*5-1=59, ...

%t a={};Do[x=12*n-1;If[PrimeQ[x],AppendTo[a,n]],{n,10^2}];a

%t Select[Range[500],PrimeQ[12#-1]&] (* _Harvey P. Dale_, May 14 2011 *)

%Y Cf. A068231 (resulting primes).

%K nonn

%O 1,2

%A _Vladimir Joseph Stephan Orlovsky_, May 14 2008

%E More terms from _Harvey P. Dale_, May 14 2011