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A231841
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Number of 3Xn 0..3 arrays with no element less than a strict majority of its horizontal and antidiagonal neighbors
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1
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64, 422, 4508, 52411, 678660, 8887871, 114873933, 1472320155, 18811450866, 240333888755, 3072777642636, 39304807956686, 502807539383400, 6431904732538361, 82273333965692552, 1052378549019652099
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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 n=4
..3..3..2..0....3..2..2..1....3..2..1..0....1..1..1..3....2..2..3..0
..0..0..0..0....2..2..1..1....2..1..0..0....0..0..2..0....0..0..0..1
..3..3..1..1....3..3..2..2....3..3..1..1....0..0..0..1....2..3..2..2
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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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