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A232120
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Number of (n+1) X (4+1) 0..2 arrays with every element both >= and <= some horizontal or vertical neighbor.
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1
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3635, 411015, 44229031, 4894583715, 539351064745, 59455853081501, 6554255427911017, 722517279545733561, 79647935033498582775, 8780120930843264963437, 967891111255430483106883
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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=1
..2..2..2..2..2....2..1..2..2..2....1..0..0..2..2....2..2..1..1..1
..2..2..1..1..1....2..0..0..1..1....1..1..1..0..0....1..1..0..0..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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