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A267643
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Number of nX7 0..1 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.
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1
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15, 450, 2829, 32303, 128441, 1117207, 3696933, 30649693, 90914453, 784186403, 2141552549, 19980003873, 50876741513, 520249434779, 1246972578665, 13942225071453, 31756214522413, 383944691019691, 839150694697605
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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=5
..0..0..1..1..0..0..1....0..1..1..0..1..0..1....0..1..0..1..0..1..1
..1..1..0..0..1..0..1....1..0..0..1..0..1..0....1..0..1..0..1..0..1
..0..0..1..1..0..1..0....0..0..1..0..1..0..1....0..1..0..1..1..0..0
..1..0..1..0..0..1..0....1..1..0..1..0..1..0....1..0..1..0..0..1..1
..1..1..0..0..1..0..1....1..1..0..0..1..0..1....1..1..0..1..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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