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A230590
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Number of nX4 0..5 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 6, and upper left element zero
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1
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0, 8, 270, 7078, 225010, 7476932, 239885668, 7573457652, 239197756936, 7567375830884, 239482620002238, 7578269700586628, 239803031035245668, 7588268963577159422, 240122303102460570488, 7598397555002280321334
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OFFSET
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1,2
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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..3..4..3....0..5..2..1....0..3..4..3....0..1..2..1....0..1..0..3
..1..0..5..2....1..2..3..0....1..0..5..2....1..2..3..0....5..2..3..4
..2..3..4..3....0..1..4..5....2..3..4..1....0..5..4..5....4..1..0..5
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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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