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A267440
Binary representation of the n-th iteration of the "Rule 129" elementary cellular automaton starting with a single ON (black) cell.
1
1, 0, 100, 0, 1111100, 1110000, 11001001100, 0, 111111111111100, 111111111110000, 1100111111111001100, 111111100000000, 11111100111110011111100, 11110000111000011110000, 110011001100100110011001100, 0, 1111111111111111111111111111100
OFFSET
0,3
REFERENCES
S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55.
MATHEMATICA
rule=129; 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 *)
CROSSREFS
Cf. A267417.
Sequence in context: A283915 A284184 A283066 * A154230 A173183 A172179
KEYWORD
nonn,easy
AUTHOR
Robert Price, Jan 15 2016
STATUS
approved