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 A204810 #10 Jul 22 2025 18:22:06 %S A204810 1,2,3,4,5,8,9,14,16,18,33,48,52,96,97,184,185,368,369,384,385,472,473 %N A204810 Langton's ant, symmetrical pattern. %C A204810 The sequence shows the number of steps that Langton's ant needs to create symmetrical patterns. %H A204810 Clemens Hovekamp, <a href="http://hovekamp.info/clemens/langton-ameise/symmetrien-langton-ameise.pdf">Langton Ameise, symmetrische Muster</a> %H A204810 Wikipedia, <a href="http://en.wikipedia.org/wiki/Langton%27s_ant">Langton's ant</a> %K A204810 nonn,full,fini %O A204810 1,2 %A A204810 _Clemens Hovekamp_, Jan 19 2012