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A232199
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Number of (n+1)X(3+1) 0..2 arrays with every element both >= and <= some horizontal, vertical or antidiagonal neighbor
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1
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685, 39651, 2064527, 108997581, 5765893981, 304936615565, 16125727718291, 852771317084487, 45096907001517677, 2384848436844497369, 126117335748613488379, 6669431203519450134085, 352697845770250504989279
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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
..2..1..1..0....2..2..0..0....2..2..0..0....0..2..2..2....1..1..2..2
..2..1..1..0....0..1..0..0....2..1..2..2....0..1..1..2....1..1..2..0
..2..2..1..1....0..0..1..1....0..0..0..1....1..1..1..1....1..2..1..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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