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A267605 Triangle read by rows giving successive states of cellular automaton generated by "Rule 181" initiated with a single ON (black) cell. 3
1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0

COMMENTS

Row n has length 2n+1.

REFERENCES

S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55.

LINKS

Robert Price, Table of n, a(n) for n = 0..10000

Eric Weisstein's World of Mathematics, Elementary Cellular Automaton

S. Wolfram, A New Kind of Science

Index entries for sequences related to cellular automata

Index to Elementary Cellular Automata

EXAMPLE

The first ten rows:

                  1

                0 1 1

              0 1 0 1 1

            0 1 1 1 0 1 1

          0 1 0 1 0 1 0 1 1

        0 1 1 1 1 1 1 1 0 1 1

      0 1 0 1 1 1 1 1 0 1 0 1 1

    0 1 1 1 0 1 1 1 0 1 1 1 0 1 1

  0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1

0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1

MATHEMATICA

rule=181; 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 *)

CROSSREFS

Sequence in context: A115198 A005614 A341753 * A319843 A309847 A266786

Adjacent sequences:  A267602 A267603 A267604 * A267606 A267607 A267608

KEYWORD

nonn,tabf,easy

AUTHOR

Robert Price, Jan 18 2016

STATUS

approved

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Last modified April 20 06:49 EDT 2021. Contains 343121 sequences. (Running on oeis4.)