login
A265246
Triangle read by rows giving successive states of cellular automaton generated by "Rule 149" initiated with a single ON (black) cell.
3
1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1
OFFSET
0
COMMENTS
Row n has length 2n+1.
REFERENCES
S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55.
EXAMPLE
Triangle begins:
1;
0,1,1;
0,0,0,1,1;
0,1,1,0,0,1,1;
0,0,0,0,1,0,0,1,1;
...
MATHEMATICA
rule = 149; rows = 20; Flatten[Table[Take[CellularAutomaton[rule, {{1}, 0}, rows-1, {All, All}][[k]], {rows - k + 1, rows + k - 1}], {k, 1, rows}]]
CROSSREFS
Cf. A226464.
Sequence in context: A068426 A267006 A280816 * A138709 A227998 A266514
KEYWORD
nonn,tabf,easy
AUTHOR
Robert Price, Dec 14 2015
STATUS
approved