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A251202
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Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2
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1
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40, 1246, 102811, 27920380, 29868134632, 129855805888645, 2203266860629332142, 141756509654699247308602, 34090982077422268972865847281, 30409612013209091174685207093821492
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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=3
..2..2..0..2....0..2..2..2....2..2..0..0....1..2..2..1....0..0..0..1
..0..2..2..2....2..0..0..2....0..0..2..0....1..2..0..1....2..2..0..1
..0..2..2..0....0..0..2..2....0..2..0..2....0..1..1..0....0..2..2..1
..0..2..2..2....0..2..0..0....0..0..0..2....2..1..1..2....0..2..2..1
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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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