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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.

A190701 Positions of 2 in A190698.

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%I A190701 #7 Jul 04 2017 18:34:22
%S A190701 2,6,10,13,17,21,28,32,36,39,43,47,51,54,58,62,69,73,77,80,84,88,92,
%T A190701 95,99,103,107,110,114,118,125,129,133,136,140,144,148,151,155,159,
%U A190701 163,166,170,174,181,185,189,192,196,200,204,207,211,215,219,222,226,230,237,241,245,248,252,256,260,263,267,271,278,282,286,289,293
%N A190701 Positions of 2 in A190698.
%C A190701 See A190698.
%H A190701 G. C. Greubel, <a href="/A190701/b190701.txt">Table of n, a(n) for n = 1..1000</a>
%t A190701 r = Sqrt[3]; b = 4; c = 1;
%t A190701 f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r];
%t A190701 t = Table[f[n], {n, 1, 200}] (* A190698 *)
%t A190701 Flatten[Position[t, 0]]      (* A190699 *)
%t A190701 Flatten[Position[t, 1]]      (* A190700 *)
%t A190701 Flatten[Position[t, 2]]      (* A190701 *)
%t A190701 Flatten[Position[t, 3]]      (* A190702 *)
%t A190701 Flatten[Position[t, 4]]      (* A190703 *)
%Y A190701 Cf. A190698.
%K A190701 nonn
%O A190701 1,1
%A A190701 _Clark Kimberling_, May 17 2011