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 A190432 #7 Apr 06 2018 22:24:48
%S A190432 5,13,18,26,34,39,47,60,68,73,81,89,94,102,115,123,128,136,149,157,
%T A190432 162,170,178,183,191,204,212,217,225,233,238,246,251,259,267,272,280,
%U A190432 293,301,306,314,322,327,335,348,356,361,369,382,390,395,403,411,416,424,437,445,450,458,466,471,479,492,500,505,513
%N A190432 Positions of 0 in A190431.
%C A190432 See A190431.
%H A190432 G. C. Greubel, <a href="/A190432/b190432.txt">Table of n, a(n) for n = 1..10000</a>
%t A190432 r = GoldenRatio; b = 3; c = 1;
%t A190432 f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r];
%t A190432 t = Table[f[n], {n, 1, 320}] (* A190431 *)
%t A190432 Flatten[Position[t, 0]] (* A190432 *)
%t A190432 Flatten[Position[t, 1]] (* A190433 *)
%t A190432 Flatten[Position[t, 2]] (* A190434 *)
%t A190432 Flatten[Position[t, 3]] (* A190435 *)
%Y A190432 Cf. A190431.
%K A190432 nonn
%O A190432 1,1
%A A190432 _Clark Kimberling_, May 10 2011