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 A190699 #7 Jul 04 2017 21:19:53 %S A190699 11,26,41,52,67,82,97,108,123,138,153,164,179,194,220,235,250,261,276, %T A190699 291,306,317,332,347,362,373,388,403,429,444,459,470,485,500,515,526, %U A190699 541,556,571,582,597,612,638,653,668,679,694,709,724,735,750,765,791,806,821,832,847,862,877,888,903,918,933,944,959,974,1000 %N A190699 Positions of 0 in A190698. %C A190699 See A190698. %H A190699 G. C. Greubel, <a href="/A190699/b190699.txt">Table of n, a(n) for n = 1..1000</a> %t A190699 r = Sqrt[3]; b = 4; c = 1; %t A190699 f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r]; %t A190699 t = Table[f[n], {n, 1, 200}] (* A190698 *) %t A190699 Flatten[Position[t, 0]] (* A190699 *) %t A190699 Flatten[Position[t, 1]] (* A190700 *) %t A190699 Flatten[Position[t, 2]] (* A190701 *) %t A190699 Flatten[Position[t, 3]] (* A190702 *) %t A190699 Flatten[Position[t, 4]] (* A190703 *) %Y A190699 Cf. A190698. %K A190699 nonn %O A190699 1,1 %A A190699 _Clark Kimberling_, May 17 2011