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A235415
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Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise
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1
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22500, 1826923, 149643266, 9676094946, 623604857055, 32662713888028, 1724073736174640, 76002795623829546, 3387480212316840735, 129022109042050899256, 4972470574066747942531, 166872014375969665991253
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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
..3..0..2..0....1..2..2..1....3..3..1..0....3..2..0..0....1..3..1..2
..3..2..1..2....2..0..1..1....3..3..0..1....3..0..2..2....1..2..0..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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