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 A190550 #7 Jul 04 2017 18:32:34 %S A190550 5,10,17,22,29,34,46,51,58,63,75,80,87,92,99,104,116,121,128,133,145, %T A190550 150,157,162,169,174,179,186,191,198,203,215,220,227,232,244,249,256, %U A190550 261,268,273,285,290,297,302,314,319,326,331,338,343,348,355,360,367,372,384,389,396,401,413,418 %N A190550 Positions of 0 in A190549. %C A190550 See A190549. %H A190550 G. C. Greubel, <a href="/A190550/b190550.txt">Table of n, a(n) for n = 1..1000</a> %t A190550 r = Sqrt[2]; b = 4; c = 1; %t A190550 f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r]; %t A190550 t = Table[f[n], {n, 1, 200}] (* A190549 *) %t A190550 Flatten[Position[t, 0]] (* A190550 *) %t A190550 Flatten[Position[t, 1]] (* A190551 *) %t A190550 Flatten[Position[t, 2]] (* A190552 *) %t A190550 Flatten[Position[t, 3]] (* A190553 *) %t A190550 Flatten[Position[t, 4]] (* A190554 *) %Y A190550 Cf. A190549. %K A190550 nonn %O A190550 1,1 %A A190550 _Clark Kimberling_, May 12 2011