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 A287736 Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 334", based on the 5-celled von Neumann neighborhood. 4
 1, 1, 0, 1, 2, 0, 0, 3, 0, 8, 4, 0, 1, 2, 17, 9, 0, 131, 4, 32, 65, 386, 76, 48, 256, 1664, 64, 92, 1600, 321, 0, 0, 4120, 34712, 6151, 2080, 1024, 17152, 98312, 2096, 0, 8199, 1152, 1136, 35400, 69696, 328257, 132446, 147792, 16400, 4229124, 3342337, 4102 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS Initialized with a single black (ON) cell at stage zero. REFERENCES S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 170. LINKS Robert Price, Table of n, a(n) for n = 0..126 Robert Price, Diagrams of first 20 stages N. J. A. Sloane, On the Number of ON Cells in Cellular Automata, arXiv:1503.01168 [math.CO], 2015 Eric Weisstein's World of Mathematics, Elementary Cellular Automaton S. Wolfram, A New Kind of Science Wolfram Research, Wolfram Atlas of Simple Programs Robert Price, Diagrams of first 20 stages MATHEMATICA CAStep[rule_, a_] := Map[rule[[10 - #]] &, ListConvolve[{{0, 2, 0}, {2, 1, 2}, {0, 2, 0}}, a, 2], {2}]; code = 334; stages = 128; rule = IntegerDigits[code, 2, 10]; g = 2 * stages + 1; (* Maximum size of grid *) a = PadLeft[{{1}}, {g, g}, 0, Floor[{g, g}/2]]; (* Initial ON cell on grid *) ca = a; ca = Table[ca = CAStep[rule, ca], {n, 1, stages + 1}]; PrependTo[ca, a]; (* Trim full grid to reflect growth by one cell at each stage *) k = (Length[ca[[1]]] + 1)/2; ca = Table[Table[Part[ca[[n]] [[j]], Range[k + 1 - n, k - 1 + n]], {j, k + 1 - n, k - 1 + n}], {n, 1, k}]; Table[FromDigits[Part[ca[[i]] [[i]], Range[i, 2 * i - 1]], 10], {i, 1, stages - 1}] CROSSREFS Cf. A287734, A287735, A287737. Sequence in context: A211871 A194586 A288437 * A180969 A259479 A238343 Adjacent sequences:  A287733 A287734 A287735 * A287737 A287738 A287739 KEYWORD nonn,easy AUTHOR Robert Price, May 30 2017 STATUS approved

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Last modified February 18 21:20 EST 2020. Contains 332028 sequences. (Running on oeis4.)