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 A267369 Total number of OFF (white) cells after n iterations of the "Rule 126" elementary cellular automaton starting with a single ON (black) cell. 1
 0, 0, 1, 1, 6, 9, 14, 14, 27, 38, 51, 58, 75, 86, 99, 99, 128, 155, 184, 207, 240, 267, 296, 311, 352, 387, 424, 447, 488, 515, 544, 544, 605, 664, 725, 780, 845, 904, 965, 1012, 1085, 1152, 1221, 1276, 1349, 1408, 1469, 1500, 1589, 1672, 1757, 1828, 1917 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 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=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 *) nbc=Table[Total[catri[[k]]], {k, 1, rows}]; (* Number of Black cells in stage n *) nwc=Table[Length[catri[[k]]]-nbc[[k]], {k, 1, rows}]; (* Number of White cells in stage n *) Table[Total[Take[nwc, k]], {k, 1, rows}] (* Number of White cells through stage n *) CROSSREFS Cf. A071035. Sequence in context: A176212 A232553 A155705 * A177891 A228804 A315975 Adjacent sequences: A267366 A267367 A267368 * A267370 A267371 A267372 KEYWORD nonn,easy AUTHOR Robert Price, Jan 13 2016 STATUS approved

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Last modified December 6 22:36 EST 2023. Contains 367616 sequences. (Running on oeis4.)