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A237226
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Number of (n+1) X (n+1) 0..2 arrays with the maximum plus the minimum of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.
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0
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81, 984, 12014, 83436, 721854, 5016852, 42143930, 257895268, 2084528746, 12713615332, 102302637674, 609602834160, 4861186951014, 29162489418784, 231673032285662, 1389160154318372
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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=4
..1..0..2..1..2....1..0..2..2..1....0..0..2..2..0....1..1..2..1..0
..1..1..2..1..0....0..0..1..1..0....0..1..1..2..2....1..0..1..2..2
..1..1..1..0..1....0..0..1..1..1....2..1..0..1..2....2..1..0..1..1
..2..1..1..1..2....0..1..2..1..1....1..2..1..1..0....2..2..1..1..1
..2..0..0..2..2....0..2..1..0..1....0..1..1..1..0....0..2..2..0..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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