%I #4 Oct 23 2024 16:08:55
%S 4,0,3,4,2,3,3,4,1,2,3,4,5,2,3,4,1,3,1,3,4,2,5,3,2,5,4,1,2,3,1,3,4,5,
%T 4,3,1,4,5,1,2,3,3,1,2,3,4,5,1,2,5,2,3,5,4,1,3,4,3,5,1,2,3,4,5,1,2,5,
%U 3,4,5,1,2,3,5,4,1,3,1,3,1,2,1,4,1,3,4,2,5,1,3,1,4,5,1,2,3,5,3,2,1,3,5,2,3
%N Semiprimes (mod 6).
%t Mod[Select[Range[500],PrimeOmega[#]==2&],6] (* _Harvey P. Dale_, Oct 23 2024 *)
%Y Cf. A001358.
%K nonn
%O 1,1
%A _Shyam Sunder Gupta_, May 07 2005