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 A267364 #8 Feb 16 2025 08:33:29
%S A267364 1,111,11011,1111111,110000011,11110001111,1100110110011,
%T A267364 111111111111111,11000000000000011,1111000000000001111,
%U A267364 110011000000000110011,11111111000000011111111,1100000011000001100000011,111100001111000111100001111,11001100110011011001100110011
%N A267364 Binary representation of the n-th iteration of the "Rule 126" elementary cellular automaton starting with a single ON (black) cell.
%D A267364 S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55.
%H A267364 Robert Price, <a href="/A267364/b267364.txt">Table of n, a(n) for n = 0..1000</a>
%H A267364 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ElementaryCellularAutomaton.html">Elementary Cellular Automaton</a>
%H A267364 S. Wolfram, <a href="http://wolframscience.com/">A New Kind of Science</a>
%H A267364 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>
%H A267364 <a href="https://oeis.org/wiki/Index_to_Elementary_Cellular_Automata">Index to Elementary Cellular Automata</a>
%t A267364 rule=126; rows=20; ca=CellularAutomaton[rule,{{1},0},rows-1,{All,All}]; (* Start with single black cell *) catri=Table[Take[ca[[k]],{rows-k+1,rows+k-1}],{k,1,rows}]; (* Truncated list of each row *) Table[FromDigits[catri[[k]]],{k,1,rows}] (* Binary Representation of Rows *)
%Y A267364 Cf. A071035.
%K A267364 nonn,easy
%O A267364 0,2
%A A267364 _Robert Price_, Jan 13 2016