

A265172


Binary representation of the nth 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
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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



MATHEMATICA

rule = 90; rows = 20; Table[FromDigits[Table[Take[CellularAutomaton[rule, {{1}, 0}, rows1, {All, All}][[k]], {rowsk+1, rows+k1}], {k, 1, rows}][[k]]], {k, 1, rows}]


CROSSREFS



KEYWORD

nonn,easy


AUTHOR



STATUS

approved



