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A079315
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Number of cells that change from OFF to ON at stage n of the cellular automaton described in A079317.
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7
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0, 1, 4, 4, 12, 4, 20, 12, 44, 4, 52, 12, 76, 12, 100, 36, 172, 4, 180, 12, 204, 12, 228, 36, 300, 12, 324, 36, 396, 36, 468, 108, 684, 4, 692, 12, 716, 12, 740, 36, 812, 12, 836, 36, 908, 36, 980, 108, 1196, 12, 1220, 36, 1292, 36, 1364, 108, 1580, 36, 1652, 108, 1868
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| Start with cell (0,0) ON; at each succeeding stage the cells that share exactly one edge with an active cell change their state.
This is not the CA discussed by Singmaster in the reference given in A079314. That was an error based on my misreading of the paper. - N. J. A. Sloane, Aug 05 2009
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LINKS
| David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
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FORMULA
| a(2n+1) = A147582(n+1), a(2n) = A151914(n).
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CROSSREFS
| Cf. A079316-A079319, A147582, A151914, A151917, A151920, A151921, A139250.
Sequence in context: A162793 A169708 A109045 * A189545 A169648 A169710
Adjacent sequences: A079312 A079313 A079314 * A079316 A079317 A079318
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Feb 12 2003
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EXTENSIONS
| More terms from John W. Layman (layman(AT)math.vt.edu), Oct 30 2003
Edited by N. J. A. Sloane, Aug 05 2009
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