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A184382
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1/12 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing three of each value
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0
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43295, 55386, 73139, 104312, 207470, 503298, 1633604, 7390644, 37119266, 201919862, 1162693358, 6783440940, 40025476760, 238338172356, 1422237022574, 8503994861102, 50939995724510
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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 with a(1,1)=0 for 4X7
..0..1..1..0..2..0..0....0..2..1..1..2..1..0....0..1..2..2..0..1..0
..0..1..0..0..1..1..2....0..2..0..0..1..0..1....0..0..1..0..1..2..2
..2..2..2..2..1..2..0....1..1..2..0..2..2..0....2..1..2..0..1..2..0
..0..1..1..0..2..0..0....0..1..2..1..1..2..0....0..1..2..2..0..1..0
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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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