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A183965
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Number of (n+1) X 4 0..2 arrays with no 2 X 2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
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1
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2601, 43163, 746017, 14219749, 272110811, 5344196941, 105022040225, 2080498882227, 41211666924625, 818324217080925, 16247715840561235, 322838617011302501, 6414430376916521533, 127476935064286493051
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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 3 X 4
..1..0..0..1....0..1..1..0....2..0..2..0....0..1..0..0....1..1..1..2
..0..2..2..2....1..0..0..1....1..1..2..2....0..1..1..1....2..2..2..1
..1..1..0..0....0..1..0..1....1..1..1..1....0..2..0..1....0..1..1..1
...
...3..4..5.......2..2..2.......4..5..6.......2..3..2.......6..6..6...
...4..5..4.......2..1..2.......4..5..6.......3..4..3.......5..6..5...
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CROSSREFS
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KEYWORD
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nonn,changed
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AUTHOR
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STATUS
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approved
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