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A177990
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Triangle read by rows, variant of A070909, a cellular automaton
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6
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1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Infinite lower triangular matrix, variant of A070909: Columns alternate between (1,0,0,0,...) and (1,1,1,...); whereas A070909 leftmost column = (1,1,1,...).
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EXAMPLE
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First few rows of the triangle =
1;
0, 1;
0, 1, 1;
0, 1, 0, 1;
0, 1, 0, 1, 1;
0, 1, 0, 1, 0, 1;
0, 1, 0, 1, 0, 1, 1;
0, 1, 0, 1, 0, 1, 0, 1;
0, 1, 0, 1, 0, 1, 0, 1, 1;
0, 1, 0, 1, 0, 1, 0, 1, 0, 1;
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1;
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;
...
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MATHEMATICA
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rows = 10; ca = CellularAutomaton[28, {{1}, 0}, rows]; Table[ca[[k, 2 ;; k]], {k, 2, rows+1}] // Flatten (* Jean-François Alcover, Jul 12 2017 *)
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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