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 A327309 #15 Sep 30 2019 10:47:23 %S A327309 2,4,6,11,13,15,20,22,24,26,31,33,35,40,42,44,46,51,53,55,60,62,64,71, %T A327309 73,75,80,82,84,91,93,95,100,102,104,109,111,113,115,120,122,124,129, %U A327309 131,133,135,140,142,144,149,151,153,155,160,162,164,169,171,173 %N A327309 Positions of 2's in {A327306(n) : n > 0}. %C A327309 The positive integers are partitioned by A327307, A327308, and A327309. %C A327309 Although a(n)/n->3, the sequence a(n)-3n appears to be unbounded. %C A327309 Positive integers k such that A327306(k) = 2. - _Jianing Song_, Sep 30 2019 %H A327309 Clark Kimberling and Jianing Song, <a href="/A327309/b327309.txt">Table of n, a(n) for n = 1..10000</a> %t A327309 r = Sqrt[6]; z = 300; %t A327309 t = Table[Floor[3 n*r] - 3 Floor[n*r], {n, 1, z}] (* {A327306(n) : n > 0} *) %t A327309 Flatten[Position[t, 0]] (* A327307 *) %t A327309 Flatten[Position[t, 1]] (* A327308 *) %t A327309 Flatten[Position[t, 2]] (* A327309 *) %Y A327309 Cf. A327306, A327307, A327308. %K A327309 nonn,easy %O A327309 1,1 %A A327309 _Clark Kimberling_, Sep 07 2019 %E A327309 Corrected by _Jianing Song_, Sep 30 2019