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 A246318 Total number of ON cells at stage 2n of two-dimensional 5-neighbor outer totalistic cellular automaton defined by "Rule 451". 12
 1, 9, 21, 45, 93, 117, 173, 205, 293, 225, 145, 369, 609, 597, 661, 789, 1033, 845, 685, 1157, 1185, 1245, 1629, 1669, 1601, 1881, 1857, 1957, 2485, 2885, 2565, 2497, 3541, 3113, 2561, 3401, 3393, 3633, 3801, 4505, 4189, 4049, 4941, 5717, 5197, 5861, 6337, 6105, 7085, 6640, 6212, 7280, 7408, 7580 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS The number of ON cells at stage 2n+1 is infinite. REFERENCES S. Wolfram, A New Kind of Science, Wolfram Media, 2002; pp. 173-175. LINKS N. J. A. Sloane, Illustration of first 24 generations MATHEMATICA Map[Function[Apply[Plus, Flatten[ #1]]], CellularAutomaton[{ 451, {2, {{0, 2, 0}, {2, 1, 2}, {0, 2, 0}}}, {1, 1}}, {{{1}}, 0}, 130]] (* then take every other term *) ArrayPlot /@ CellularAutomaton[{451, {2, {{0, 2, 0}, {2, 1, 2}, {0, 2, 0}}}, {1, 1}}, {{{1}}, 0}, 23] CROSSREFS Cf. A169699, A246316. Sequence in context: A020190 A225507 A135187 * A277715 A173391 A259243 Adjacent sequences:  A246315 A246316 A246317 * A246319 A246320 A246321 KEYWORD nonn AUTHOR N. J. A. Sloane, Aug 27 2014 STATUS approved

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Last modified June 17 19:10 EDT 2019. Contains 324198 sequences. (Running on oeis4.)