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 A151776 Number of ON states after n generations of cellular automaton based on f.c.c. lattice with each cell adjacent to its twelve neighbors. 5
 0, 1, 13, 25, 109, 121, 205, 385, 805, 817, 901, 1081, 1645, 2185, 2605, 3721, 5749, 5857, 5941, 6121, 6685, 7225, 7789, 9289, 12565, 14401, 14821, 15937, 18877, 23257, 25981, 32233, 42445, 43729, 44101, 44521 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS We take the f.c.c. lattice to consist of the points (X,Y,Z) of Z^3 with X+Y+Z even. We start with a single ON cell at the origin. A cell is turned ON if exactly one of its twelve neighbors is ON. An ON cell remains ON forever. Analog of A147562, which is corresponding sequence for the square lattice Z^2. If we just look at what happens in the (X,Y)-plane, we get A147552 and A151836. LINKS Nathaniel Johnston, Table of n, a(n) for n = 0..68 David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.] Nathaniel Johnston, C script N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS Index entries for sequences related to f.c.c. lattice CROSSREFS Cf. A151777, A151778, A147562, A151725, A139250. Sequence in context: A298037 A283255 A322662 * A301327 A116524 A053404 Adjacent sequences: A151773 A151774 A151775 * A151777 A151778 A151779 KEYWORD nonn AUTHOR N. J. A. Sloane, Jun 24 2009 EXTENSIONS Terms after a(30) from Nathaniel Johnston, Mar 27 2011 STATUS approved

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Last modified August 9 01:26 EDT 2024. Contains 375024 sequences. (Running on oeis4.)