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A199146
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Number of nX5 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors
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1
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3, 393, 42420, 6235011, 839006010, 117380324984, 16158623337745, 2239304268913257, 309471298054332806, 42818034223579225138, 5921413251810033475103, 819050117505774849777870
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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=3
..0..0..0..0..1....0..0..1..1..1....0..0..1..1..1....0..0..1..0..0
..2..1..2..2..1....2..0..3..3..1....2..1..1..2..3....2..2..1..1..1
..2..1..2..1..1....2..3..3..2..2....2..0..0..2..3....0..0..2..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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