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A266209
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Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any horizontal, vertical, diagonal or antidiagonal neighbor equal to 4-1.
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1
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8, 8, 8, 16, 312, 14936, 310552, 8027264, 153019144, 3430340488, 64644807000, 1348807023952, 25490020592680, 512739267856872, 9742558843713512, 192399460839867616, 3675912909241399304, 71947890449406450248
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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=6
..1..1..3..3..2..3....2..2..0..1..3..3....0..0..1..3..2..3....3..2..0..1..3..2
..0..1..1..3..2..2....2..2..0..1..3..3....0..0..1..3..2..2....3..2..0..1..3..3
..0..0..1..3..2..0....2..2..0..1..3..1....0..1..1..3..2..3....2..2..0..1..1..3
..2..0..1..3..2..0....0..0..0..1..1..3....1..0..1..3..2..2....0..2..0..0..1..1
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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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