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 A190434 #8 Apr 09 2018 02:56:12
%S A190434 1,4,6,9,14,17,19,22,27,30,32,35,38,40,43,48,51,53,56,59,61,64,66,69,
%T A190434 72,74,77,82,85,87,90,93,95,98,103,106,108,111,116,119,121,124,127,
%U A190434 129,132,137,140,142,145,148,150,153,158,161,163,166,171,174,176,179,182,184,187,192,195,197,200,203,205,208,210
%N A190434 Positions of 2 in A190431.
%C A190434 See A190431.
%H A190434 G. C. Greubel, <a href="/A190434/b190434.txt">Table of n, a(n) for n = 1..10000</a>
%t A190434 r = GoldenRatio; b = 3; c = 1;
%t A190434 f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r];
%t A190434 t = Table[f[n], {n, 1, 320}] (* A190431 *)
%t A190434 Flatten[Position[t, 0]] (* A190432 *)
%t A190434 Flatten[Position[t, 1]] (* A190433 *)
%t A190434 Flatten[Position[t, 2]] (* A190434 *)
%t A190434 Flatten[Position[t, 3]] (* A190435 *)
%Y A190434 Cf. A190431.
%K A190434 nonn
%O A190434 1,2
%A A190434 _Clark Kimberling_, May 10 2011