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A239173
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Number of (n+1)X(3+1) 0..2 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors
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1
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98, 514, 9604, 130890, 1876940, 26726740, 381984614, 5442841504, 77654661978, 1107987680604, 15802237635146, 225425167338190, 3215775310811444, 45870835552152286, 654345984389717822, 9334191267457643510
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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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FORMULA
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Empirical recurrence of order 67 (see link above)
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EXAMPLE
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Some solutions for n=4
..2..2..2..2....1..1..1..1....1..1..1..0....0..1..1..0....0..2..2..1
..0..1..1..0....2..2..2..0....0..0..2..2....2..2..2..2....1..1..1..0
..1..1..0..0....1..2..2..0....2..2..2..0....1..1..1..0....0..2..2..1
..0..0..2..2....0..0..1..1....2..2..1..1....1..2..2..2....2..2..1..0
..2..2..1..1....1..1..0..0....0..0..0..0....0..1..1..0....0..0..2..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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