A267606 Binary representation of the n-th iteration of the "Rule 181" elementary cellular automaton starting with a single ON (black) cell.

1, 11, 1011, 111011, 10101011, 1111111011, 101111101011, 11101110111011, 1010101010101011, 111111111111111011, 10111111111111101011, 1110111111111110111011, 101010111111111010101011, 11111110111111101111111011, 1011111010111110101111101011

Offset

0,2

References

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

Links

Robert Price, Table of n, a(n) for n = 0..1000

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

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 *) Table[FromDigits[catri[[k]]], {k, 1, rows}]   (* Binary Representation of Rows *)

Crossrefs

Cf. A267605.

Sequence in context: A289886 A127961 A127962 * A303786 A015511 A065050

Adjacent sequences: A267603 A267604 A267605 * A267607 A267608 A267609

Keyword

nonn,easy

Author

Robert Price, Jan 18 2016

Status

approved