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 A327298 #12 Sep 15 2019 20:11:44
%S A327298 0,0,0,1,1,2,2,2,0,0,1,1,2,2,2,0,0,1,1,2,2,2,0,0,1,1,2,2,2,0,0,1,1,2,
%T A327298 2,2,0,0,1,1,1,2,2,0,0,1,1,1,2,2,0,0,1,1,1,2,2,0,0,1,1,1,2,2,0,0,1,1,
%U A327298 1,2,2,0,0,1,1,1,2,2,0,0,0,1,1,2,2,0
%N A327298 a(n) = floor(3*n*Pi) - 3*floor(n*Pi).
%H A327298 Clark Kimberling, <a href="/A327298/b327298.txt">Table of n, a(n) for n = 0..10000</a>
%F A327298 a(n) = floor(3*n*Pi) - 3*floor(n*Pi).
%t A327298 r = Pi; z = 300;
%t A327298 t = Table[Floor[3 n*r] - 3 Floor[n*r], {n, 0, z}]
%Y A327298 The positions of 0's, 1's and 2's in {a(n) : n > 0} are given by A327299, A327300 and A327301.
%K A327298 nonn,easy
%O A327298 0,6
%A A327298 _Clark Kimberling_, Sep 05 2019