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A266624
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Binary representation of the middle column of the "Rule 45" elementary cellular automaton starting with a single ON (black) cell.
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1
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1, 11, 111, 1110, 11100, 111001, 1110011, 11100110, 111001100, 1110011001, 11100110010, 111001100101, 1110011001011, 11100110010111, 111001100101110, 1110011001011101, 11100110010111011, 111001100101110110, 1110011001011101101, 11100110010111011011
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OFFSET
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0,2
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REFERENCES
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S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55.
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LINKS
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MATHEMATICA
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rule=45; 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 *) mc=Table[catri[[k]][[k]], {k, 1, rows}]; (* Keep only middle cell from each row *) Table[FromDigits[Take[mc, k]], {k, 1, rows}] (* Binary Representation of Middle Column *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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