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 A268575 The number of alive cells in Conway's Game of Life starting with the "Die hard" initial pattern. 0
 7, 8, 8, 11, 10, 10, 12, 12, 16, 16, 24, 18, 17, 19, 19, 25, 21, 30, 19, 21, 18, 18, 22, 20, 20, 20, 23, 20, 23, 20, 15, 23, 15, 16, 16, 15, 16, 17, 20, 18, 19, 21, 25, 27, 30, 33, 30, 36, 30, 29, 24, 22, 22, 23, 23, 37, 26, 26, 28, 31, 33, 35, 30, 30, 25, 23, 17, 15, 12, 16, 12, 14, 11, 8, 9, 10, 13, 15, 22, 13, 15, 16, 17, 17, 24, 20, 25, 21, 29, 23, 27, 28, 37, 32, 40, 22, 30, 23, 21, 21, 23, 17, 21, 17, 16, 16, 20, 15, 23, 18, 21, 20, 23, 20, 22, 13, 15, 10, 13, 9, 11, 7, 5, 7, 6, 5, 6, 5, 3, 2, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Population vanishes after 130 generations. LINKS LifeWiki, Die hard Eric Weisstein's MathWorld, Game of Life Wikipedia, Conway's Game of Life MATHEMATICA maxIter = 200; halfWidth = h = 100; GameOfLife = {224, {2, {{2, 2, 2}, {2, 1, 2}, {2, 2, 2}}}, {1, 1}}; grids = CellularAutomaton[GameOfLife, SparseArray[{{h + 3, h + 2} -> 1, {h - 3, h + 1} -> 1, {h - 2, h + 1} -> 1, {h - 2, h} -> 1, {h + 2, h} -> 1, {h + 3, h} -> 1, {h + 4, h} -> 1} ], 2h]; a[n_] := grids[[n + 1]] // Flatten // Total; Table[a[n], {n, 0, maxIter}] //. {a__, 0, 0} :> {a, 0} CROSSREFS Cf. A179409, A268857. Sequence in context: A226320 A021563 A333938 * A198814 A254272 A284363 Adjacent sequences:  A268572 A268573 A268574 * A268576 A268577 A268578 KEYWORD nonn,fini,full AUTHOR Jean-François Alcover, Feb 21 2016 STATUS approved

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Last modified August 3 02:48 EDT 2021. Contains 346435 sequences. (Running on oeis4.)