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A238932
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Number of (3+1)X(n+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors
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1
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144, 13456, 611524, 25080064, 1176627204, 56843142724, 2709454265764, 128279816340624, 6079146560329924, 288422073077743396, 13684604007820147600, 649179381582973359556, 30795222312008784568324
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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=2
..3..3..1....3..3..0....3..3..1....0..3..3....3..3..1....1..1..0....1..1..1
..1..1..0....1..2..2....2..2..0....2..2..1....1..1..0....3..3..2....0..3..3
..3..3..2....0..2..2....0..2..2....2..2..1....2..2..1....0..2..2....2..2..2
..2..2..1....2..3..3....3..3..0....1..3..3....3..3..0....3..3..3....1..1..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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