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A184075
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Number of (n+1)X4 0..2 arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one
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1
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150, 239, 1436, 5760, 25954, 104404, 422992, 1588555, 5471235, 17366119, 50883759, 138309491, 350886736, 834954298, 1873682709, 3985258309, 8070671272, 15625241986, 29027866689, 51922380121, 89705278727, 150134603779
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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 3X4
..1..1..1..2....0..0..1..2....0..0..0..2....1..1..1..2....0..0..1..1
..1..1..2..1....0..2..0..1....0..1..1..0....1..2..2..2....0..1..0..1
..1..2..1..1....1..0..2..0....1..0..0..1....2..0..2..1....1..0..0..1
...
...4..5..6.......2..3..4.......1..2..3.......5..6..7.......1..2..3...
...5..6..5.......3..4..3.......2..2..2.......5..6..7.......2..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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