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A151731
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Number of ON states after n generations of cellular automaton based on square grid with each cell adjacent to its eight neighbors.
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6
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0, 2, 6, 14, 20, 32, 40, 54, 70, 94, 108, 128, 152, 172, 188, 224, 256, 300, 344, 380, 416, 464, 504, 552, 598, 658, 728, 772, 816, 880, 940, 1000, 1076, 1148, 1212, 1276, 1360, 1454, 1556, 1624, 1708, 1796, 1912, 2004, 2124, 2250, 2376, 2480
(list;
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text;
internal format)
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OFFSET
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0,2
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COMMENTS
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A cell is turned ON if exactly two of its eight neighbors is ON. An ON cell remains ON forever.
We start with two edge-adjacent ON cells.
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LINKS
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PROG
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(PARI) See Links section.
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CROSSREFS
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See A151725, A151726 for the same CA except that exactly one neighbor must be ON for a cell to turn ON.
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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