%I #7 Sep 08 2022 08:45:41
%S 5,8,10,11,14,15,17,20,23,24,25,26,29,30,31,32,35,37,38,40,41,44,45,
%T 47,48,50,52,53,55,56,59,60,62,63,65,66,68,70,71,73,74,75,76,77,80,81,
%U 82,83,85,86,87,89,90,92,94,95,98,99,100,101,102,103,104,105,107,108,110
%N Numbers n such that 4*n5 is not a prime number.
%H Vincenzo Librandi, <a href="/A156288/b156288.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Range[2, 150], !PrimeQ[4 #  5]&] (* _Vincenzo Librandi_, Apr 06 2013 *)
%o (Magma) [n: n in [2..150]  not IsPrime(4*n5)]; // _Vincenzo Librandi_, Apr 06 2013
%Y Cf. A156287.
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Feb 07 2009
