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A184473
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1/6 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last
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1
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45585, 62213, 86575, 127689, 247879, 520289, 1219455, 3727073, 11454631, 35847321, 132023695, 462435665, 1581583095, 6139850633, 22407327775, 78976349889, 312058001959, 1156657902329, 4125792115215, 16415153428433
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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..2..0..0..1..0..0....0..0..0..0..1..1..1....0..2..1..0..0..1..0
..0..1..0..0..2..1..0....0..1..1..0..0..2..0....0..1..0..1..2..1..1
..1..1..1..1..1..0..1....1..1..2..1..1..0..0....1..0..1..0..1..0..0
..0..2..0..0..1..0..0....0..0..0..0..1..1..1....0..2..1..0..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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