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Binary representation of the n-th iteration of the "Rule 89" elementary cellular automaton starting with a single ON (black) cell.
1

%I #7 Jan 09 2016 16:22:34

%S 1,1,11010,110011,101110100,10100111,1110000101000,10111100001111,

%T 10001001111010000,11001010010011111,110111000010010100000,

%U 1101011110010000111111,1011000100110011101000000,111100101110101001111111,11101001100010100001010000000

%N Binary representation of the n-th iteration of the "Rule 89" elementary cellular automaton starting with a single ON (black) cell.

%D S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55.

%H Robert Price, <a href="/A267038/b267038.txt">Table of n, a(n) for n = 0..1000</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ElementaryCellularAutomaton.html">Elementary Cellular Automaton</a>

%H S. Wolfram, <a href="http://wolframscience.com/">A New Kind of Science</a>

%H <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>

%H <a href="https://oeis.org/wiki/Index_to_Elementary_Cellular_Automata">Index to Elementary Cellular Automata</a>

%t rule=89; 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 Cf. A267037.

%K nonn,easy

%O 0,3

%A _Robert Price_, Jan 09 2016