%I #9 Dec 29 2017 18:12:54
%S 1,5,9,13,14,17,18,22,26,30,31,34,35,39,43,47,48,51,52,56,60,64,68,69,
%T 73,77,81,85,86,89,90,94,98,102,103,106,107,111,115,119,120,123,124,
%U 128,132,136,140,141,145,149,153,157,158,161,162,166,170,174,175,178,179,183,187,191,192,195,196,200,204,208,212,213,217
%N Positions of 0 in A189463.
%C See A189463.
%H G. C. Greubel, <a href="/A189464/b189464.txt">Table of n, a(n) for n = 1..5000</a>
%t r = 5^(1/2);
%t f[n_] := Floor[3 n*r] - 3*Floor[n*r];
%t t = Table[f[n], {n, 1, 220}] (* A189463 *)
%t Flatten[Position[t, 0]] (* A189464 *)
%t Flatten[Position[t, 1]] (* A189465 *)
%t Flatten[Position[t, 2]] (* A190158 *)
%Y Cf. A189463, A189465, A190158.
%K nonn
%O 1,2
%A _Clark Kimberling_, Apr 22 2011