A267365 Decimal representation of the n-th iteration of the "Rule 126" elementary cellular automaton starting with a single ON (black) cell.

1, 7, 27, 127, 387, 1935, 6579, 32767, 98307, 491535, 1671219, 8356095, 25264899, 126324495, 429503283, 2147483647, 6442450947, 32212254735, 109521666099, 547608330495, 1655709893379, 8278549466895, 28147068187443, 140735340937215, 422218907713539

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

A. J. Macfarlane, Generating functions for integer sequences defined by the evolution of cellular automata..., Fig. 3.

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=126; 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]], 2], {k, 1, rows}]   (* Decimal Representation of Rows *)

Crossrefs

Cf. A071035.

Sequence in context: A327623 A269070 A147996 * A034536 A283538 A214459

Adjacent sequences: A267362 A267363 A267364 * A267366 A267367 A267368

Keyword

nonn,easy

Author

Robert Price, Jan 13 2016

Status

approved