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A183498
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Half the number of nX5 0..2 arrays with no element equal to the sum mod 3 of its horizontal and vertical neighbors
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1
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18, 540, 16512, 524288, 16796160, 536870912, 17180393472, 549761399856, 17592219598848, 562949953421312, 18014402847965184, 576460752303423488, 18446744211148505088, 590295811461438504960, 18889465940274673876992
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for 3X5
..1..1..2..2..2....2..0..1..2..2....2..0..2..0..2....0..1..2..2..1
..2..0..1..0..2....1..2..0..0..1....1..0..0..0..1....0..0..0..0..0
..0..0..1..2..2....2..2..2..2..1....0..0..2..1..0....2..0..0..2..1
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CROSSREFS
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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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