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A177990 Triangle read by rows, variant of A070909, a cellular automaton 6
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)
OFFSET
1,1
COMMENTS
LINKS
FORMULA
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,...).
EXAMPLE
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;
...
MATHEMATICA
rows = 10; ca = CellularAutomaton[28, {{1}, 0}, rows]; Table[ca[[k, 2 ;; k]], {k, 2, rows+1}] // Flatten (* Jean-François Alcover, Jul 12 2017 *)
CROSSREFS
Sequence in context: A176330 A363914 A266246 * A287722 A284588 A113704
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, May 16 2010
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)