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Positions of 0 in A189463.
5

%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