%I #18 Feb 11 2024 11:14:44
%S 0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,1,0,0,
%T 1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,1,0,1,0,0,1,0,1,0,1,0,0,1,0,1,0,0,1,
%U 0,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,0,1,0,0,1,0
%N 1 if n-th composite number A002808(n) is divisible by 3, otherwise 0.
%C a(n) = 1 - A361122(n).
%H Harvey P. Dale, <a href="/A361123/b361123.txt">Table of n, a(n) for n = 1..1000</a>
%t With[{nn=200},If[Mod[#,3]==0,1,0]&/@Select[Range[nn],CompositeQ]] (* _Harvey P. Dale_, Feb 11 2024 *)
%Y Cf. A002808, A181923, A361121, A361122.
%K nonn
%O 1
%A _Scott R. Shannon_, _Rémy Sigrist_ and _N. J. A. Sloane_, Mar 04 2023