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A206265
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Number of (n+1)X7 0..1 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock equal to the number in all its horizontal and vertical neighbors
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1
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105, 128, 339, 800, 1725, 3440, 6444, 11448, 19457, 31832, 50397, 77528, 116289, 170552, 245166, 346112, 480709, 657808, 888039, 1184048, 1560789, 2035808, 2629584, 3365864, 4272057, 5379624, 6724529, 8347688, 10295481, 12620264
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OFFSET
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1,1
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COMMENTS
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Column 6 of A206267
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 7*a(n-1) -20*a(n-2) +28*a(n-3) -14*a(n-4) -14*a(n-5) +28*a(n-6) -20*a(n-7) +7*a(n-8) -a(n-9) for n>10
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EXAMPLE
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Some solutions for n=4
..0..1..0..1..0..1..0....1..0..0..1..1..0..0....0..1..0..1..0..1..0
..1..0..1..0..1..0..1....1..1..0..0..1..1..0....1..0..1..0..1..0..1
..0..1..0..1..0..1..0....0..1..1..0..0..1..1....0..1..0..1..0..1..0
..1..0..1..0..1..0..1....0..0..1..1..0..0..1....1..0..1..0..1..0..1
..0..1..0..1..0..1..0....1..0..0..1..1..0..0....0..1..0..1..0..1..1
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CROSSREFS
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Sequence in context: A162304 A033268 A095643 * A097217 A115935 A069702
Adjacent sequences: A206262 A206263 A206264 * A206266 A206267 A206268
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Feb 05 2012
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STATUS
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approved
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