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A198712
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Number of nX5 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor
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2
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14, 1201, 107042, 9548295, 851787199, 75987485516, 6778819400772, 604736581320925, 53948385378521909, 4812720805166620356, 429341516830025751982, 38301440209010857426775, 3416861087749979581617789
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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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FORMULA
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Empirical: a(n) = 119*a(n-1) -2929*a(n-2) +25066*a(n-3) -76115*a(n-4) -887*a(n-5) +324153*a(n-6) -444798*a(n-7) +175392*a(n-8)
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EXAMPLE
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Some solutions with all values from 0 to 3 for n=4
..0..1..2..0..2....0..1..2..3..1....0..1..0..2..0....0..1..2..0..1
..1..0..3..2..3....1..0..3..1..0....1..0..1..0..1....1..0..1..2..3
..0..1..2..3..1....0..1..2..3..2....0..1..2..1..3....0..1..0..3..1
..1..3..0..2..3....1..2..1..2..1....1..3..0..3..2....1..0..2..1..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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