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 A190433 #7 Apr 06 2018 22:24:54 %S A190433 2,7,10,12,15,20,23,25,28,31,33,36,41,44,46,49,52,54,57,62,65,67,70, %T A190433 75,78,80,83,86,88,91,96,99,101,104,107,109,112,114,117,120,122,125, %U A190433 130,133,135,138,141,143,146,151,154,156,159,164,167,169,172,175,177,180,185,188,190,193,196,198,201 %N A190433 Positions of 1 in A190431. %C A190433 See A190431. %H A190433 G. C. Greubel, <a href="/A190433/b190433.txt">Table of n, a(n) for n = 1..10000</a> %t A190433 r = GoldenRatio; b = 3; c = 1; %t A190433 f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r]; %t A190433 t = Table[f[n], {n, 1, 320}] (* A190431 *) %t A190433 Flatten[Position[t, 0]] (* A190432 *) %t A190433 Flatten[Position[t, 1]] (* A190433 *) %t A190433 Flatten[Position[t, 2]] (* A190434 *) %t A190433 Flatten[Position[t, 3]] (* A190435 *) %Y A190433 Cf. A190431. %K A190433 nonn %O A190433 1,1 %A A190433 _Clark Kimberling_, May 10 2011