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 A275302 #16 Nov 02 2016 05:34:25 %S A275302 0,6,24,30,72,78,96,102,108,174,180,198,212,222,252,282,292,306,324, %T A275302 330,408,414,420,438,444,522,544,554,576,594,648,666,672,798,804,810, %U A275302 852,858,920,926,972,978,984,1018,1024,1154,1160,1178,1184,1190,1208,1214 %N A275302 Iterations at which Langton's Ant living on triangular tiling passes through the origin. %C A275302 Langton's Ant living on triangular tiling (or, equivalently, hexagonal grid) follows the rules similar to those of the ordinary Langton's ant. On a white cell, turn 60 degrees right, flip the color of the cell, then move forward one unit. On a black cell, turn 60 degrees left, flip the color of the cell, then move forward one unit. %C A275302 On these iterations pattern becomes symmetric. Orientation of the ant on these iterations is always the same. %C A275302 Empirically, a(n) ~ c*n^1.207. %H A275302 Andrey Zabolotskiy, <a href="/A275302/b275302.txt">Table of n, a(n) for n = 1..25000</a> (calculated using _Oleg Nikulin_'s program) %H A275302 Wikipedia, <a href="https://en.wikipedia.org/wiki/Turmite">Turmite</a> %Y A275302 Cf. A102358, A204810, A269757, A275303, A275304, A275305. %K A275302 nonn %O A275302 1,2 %A A275302 _Oleg Nikulin_, Jul 22 2016