This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A190428 #9 Apr 06 2018 22:24:20
%S A190428 5,10,13,18,26,31,34,39,47,52,60,65,68,73,81,86,89,94,99,102,107,115,
%T A190428 120,123,128,136,141,149,154,157,162,170,175,178,183,188,191,196,204,
%U A190428 209,212,217,225,230,233,238,243,246,251,259,264,267,272,280,285,293,298,301,306,314,319
%N A190428 Positions of 0 in A190427.
%C A190428 See A190427.
%H A190428 G. C. Greubel, <a href="/A190428/b190428.txt">Table of n, a(n) for n = 1..10000</a>
%t A190428 r = GoldenRatio; b = 2; c = 1;
%t A190428 f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r];
%t A190428 t = Table[f[n], {n, 1, 320}] (* A190427 *)
%t A190428 Flatten[Position[t, 0]] (* A190428 *)
%t A190428 Flatten[Position[t, 1]] (* A190429 *)
%t A190428 Flatten[Position[t, 2]] (* A190430 *)
%Y A190428 Cf. A190427, A190429, A190430.
%K A190428 nonn
%O A190428 1,1
%A A190428 _Clark Kimberling_, May 10 2011