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A222495
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Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order
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1
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0, 4, 6, 95, 525, 7420, 40428, 636953, 3473192, 57944170, 307452564, 5382036893, 27808882969, 505897592674, 2555395714322, 47885314854974, 237764769206647, 4553475954110482, 22336733995345136, 434447462103135220
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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=4
..0..1..2....0..1..1....0..1..0....0..0..1....0..1..2....0..1..0....0..0..0
..0..1..1....2..1..3....1..1..0....0..0..0....0..0..0....0..1..1....1..0..0
..1..1..1....1..1..1....1..1..1....2..0..0....0..0..0....1..1..1....0..0..0
..1..1..1....1..1..1....1..1..1....0..0..0....0..0..0....1..1..1....2..0..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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