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A202925
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Number of nX2 0..2 arrays with adjacent row and column sums unequal
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1
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6, 52, 352, 2444, 17508, 124340, 872940, 6112832, 42822036, 299718840, 2094967284, 14630909636, 102130256404, 712606093984, 4970091031972, 34652009741528, 241529705097892, 1683093292484152, 11726099598816180, 81680440933444532
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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
..2..2....2..1....2..0....1..0....1..0....1..1....0..1....1..1....2..2....2..0
..1..0....0..0....1..0....2..1....0..2....1..0....2..2....0..1....2..0....1..0
..0..0....2..0....0..0....0..1....1..2....1..1....1..2....1..2....0..0....1..1
..2..0....0..1....0..1....0..0....0..1....1..0....0..0....0..0....0..1....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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