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A228974
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Number of nX4 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1)X5 0..2 array.
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0
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81, 6387, 485397, 32175213, 2056956837, 129504297807, 8110003331559, 506820492353703, 31647512289810393, 1975556815959556587, 123306671912401161489
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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
..0..0..0..2....0..0..0..1....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..1..2....0..0..0..1....0..0..0..0....0..0..0..1....0..0..1..1
..0..2..0..2....0..0..1..0....0..0..0..2....1..0..1..0....2..2..2..0
..2..2..0..2....0..2..2..2....0..1..1..1....2..0..1..1....1..2..2..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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