A266622 - OEIS

A266622

Decimal representation of the n-th iteration of the "Rule 45" elementary cellular automaton starting with a single ON (black) cell.

1, 2, 15, 80, 109, 1718, 987, 29804, 6833, 503754, 61471, 8196000, 446685, 132869478, 4044683, 2135349340, 28010209, 34275691290, 252075183, 548965769712, 1832196621, 8790562745814, 16523720315, 140687644563596, 114063811921, 2251453327265770, 1038913441855

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

REFERENCES

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

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..249

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=45; 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. A266619.

Sequence in context: A216247 A291972 A056079 * A036239 A268735 A215705

Adjacent sequences: A266619 A266620 A266621 * A266623 A266624 A266625

KEYWORD

nonn,easy

AUTHOR

Robert Price, Jan 01 2016

STATUS

approved