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A267148 Number of ON (black) cells in the n-th iteration of the "Rule 105" elementary cellular automaton starting with a single ON (black) cell. 1
1, 0, 3, 2, 3, 2, 5, 4, 3, 10, 9, 8, 5, 12, 11, 10, 3, 26, 9, 24, 9, 16, 15, 14, 5, 36, 15, 30, 11, 26, 21, 20, 3, 58, 9, 56, 9, 48, 15, 46, 9, 56, 27, 42, 15, 46, 33, 32, 5, 84, 15, 78, 15, 62, 25, 56, 11, 82, 33, 64, 21, 60, 43, 42, 3, 122, 9, 120, 9, 112 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

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=105; 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[Total[catri[[k]]], {k, 1, rows}] (* Number of Black cells in stage n *)

CROSSREFS

Cf. A267145.

Sequence in context: A092962 A258778 A112924 * A230406 A214254 A153092

Adjacent sequences:  A267145 A267146 A267147 * A267149 A267150 A267151

KEYWORD

nonn,easy

AUTHOR

Robert Price, Jan 11 2016

STATUS

approved

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Last modified May 23 07:00 EDT 2019. Contains 323508 sequences. (Running on oeis4.)