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A235259
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Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise
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1
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2400, 75744, 2691067, 64470056, 1538378437, 27988093692, 507441199620, 7534804140934, 111681101728373, 1415861956568375, 17929576294589042, 199950651421904706, 2227935030929519936, 22325110214811735679
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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=2
..0..2..3....1..0..1....0..0..3....0..2..2....3..0..3....2..0..0....0..3..0
..2..3..0....1..1..3....0..1..2....2..1..1....0..0..1....0..2..2....1..3..2
..2..2..0....3..0..3....3..2..3....3..3..0....0..3..0....2..2..0....3..3..3
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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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