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A266672
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Triangle read by rows giving successive states of cellular automaton generated by "Rule 57" initiated with a single ON (black) cell.
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3
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1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0
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COMMENTS
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Row n has length 2n+1.
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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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EXAMPLE
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The first ten rows:
1
0 0 1
0 1 0 1 0
1 0 0 1 0 1 1
0 0 1 0 0 1 1 0 0
1 1 0 0 1 0 1 0 1 1 1
0 0 0 1 0 0 1 0 1 1 0 0 0
1 1 1 0 0 1 0 0 1 1 0 1 1 1 1
0 0 0 0 1 0 0 1 0 1 0 1 1 0 0 0 0
1 1 1 1 0 0 1 0 0 1 0 1 1 0 1 1 1 1 1
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MATHEMATICA
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rule=57; 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 *) Flatten[catri] (* Triangle Representation of CA *)
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CROSSREFS
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KEYWORD
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nonn,tabf,easy
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AUTHOR
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STATUS
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approved
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