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A183695
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Number of (n+1)X7 0..2 arrays with every 2X2 subblock nonsingular
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1
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486746, 205047906, 84872526674, 35325040673626, 14676897303777902, 6101430466182955346, 2535999716660879680590, 1054127029029754862576918, 438155240020993469139854206, 182123496360117569534537367118
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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 3X7
..1..0..2..0..2..0..1....1..0..1..0..1..0..1....1..0..2..0..1..1..0
..0..2..0..1..0..1..2....0..2..0..2..0..2..0....0..1..0..1..0..1..1
..1..0..1..1..1..2..0....2..0..2..1..1..0..1....1..0..1..0..1..1..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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