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 A190545 #9 Jul 04 2017 04:01:33 %S A190545 3,5,10,15,17,22,27,29,34,39,44,46,51,56,58,63,68,73,75,80,85,87,92, %T A190545 97,99,102,104,109,114,116,121,126,128,133,138,143,145,150,155,157, %U A190545 162,167,169,172,174,179,184,186,191,196,198,203,208,213,215,220,225,227,232,237,242,244,249,254,256,261,266,268,273,278,283,285 %N A190545 Positions of 0 in A190544. %C A190545 See A190544. %H A190545 G. C. Greubel, <a href="/A190545/b190545.txt">Table of n, a(n) for n = 1..1000</a> %t A190545 r = Sqrt[2]; b = 4; c = 0; %t A190545 f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r]; %t A190545 t = Table[f[n], {n, 1, 200}] (* A190544 *) %t A190545 Flatten[Position[t, 0]] (* A190545 *) %t A190545 Flatten[Position[t, 1]] (* A190546 *) %t A190545 Flatten[Position[t, 2]] (* A190547 *) %t A190545 Flatten[Position[t, 3]] (* A190548 *) %Y A190545 Cf. A190544. %K A190545 nonn %O A190545 1,1 %A A190545 _Clark Kimberling_, May 12 2011