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A265665
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Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any horizontal or vertical neighbor equal to 4-1.
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1
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8, 112, 1608, 34056, 828152, 22810912, 669333208, 20546265528, 649861726120, 21020496729712, 691708911692440, 23078550392326408, 778812907863938840, 26534665934493312256, 911468660655321411048, 31531001251952600414360
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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
..1..1..0..0....3..1..1..3....2..0..1..0....3..1..0..2....3..1..1..3
..1..0..1..0....3..1..3..1....0..1..0..2....1..1..0..0....2..3..1..1
..3..2..3..2....2..0..2..0....1..3..2..3....1..3..2..0....3..2..0..0
..2..3..2..3....2..2..0..0....3..1..3..2....3..2..3..2....2..0..2..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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