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A265172 Binary representation of the n-th iteration of the "Rule 90" elementary cellular automaton starting with a single ON cell. 1
1, 101, 10001, 1010101, 100000001, 10100000101, 1000100010001, 101010101010101, 10000000000000001, 1010000000000000101, 100010000000000010001, 10101010000000001010101, 1000000010000000100000001, 101000001010000010100000101, 10001000100010001000100010001 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Rules 26, 82, 90, 146, 154, 210 and 218 also generate this sequence.
REFERENCES
S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55.
LINKS
Eric Weisstein's World of Mathematics, Elementary Cellular Automaton
MATHEMATICA
rule = 90; rows = 20; Table[FromDigits[Table[Take[CellularAutomaton[rule, {{1}, 0}, rows-1, {All, All}][[k]], {rows-k+1, rows+k-1}], {k, 1, rows}][[k]]], {k, 1, rows}]
CROSSREFS
Cf. A070886.
Sequence in context: A291990 A303572 A152756 * A153500 A262861 A371563
KEYWORD
nonn,easy
AUTHOR
Robert Price, Dec 05 2015
STATUS
approved

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Last modified June 18 07:40 EDT 2024. Contains 373469 sequences. (Running on oeis4.)