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A238512
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Number of (n+1)X(3+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..3 introduced in row major order
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1
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295, 14407, 2074468, 232354383, 27474561391, 3210307720768, 376089959883919, 44034161734024287, 5156342833939923172, 603784568551904193175, 70700880287741698132135, 8278793823713613200756352
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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) = 104*a(n-1) +1814*a(n-2) -33896*a(n-3) +122714*a(n-4) +37814*a(n-5) -424991*a(n-6) -78106*a(n-7) +187964*a(n-8) -38416*a(n-9)
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EXAMPLE
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Some solutions for n=2
..0..1..1..2....0..1..2..1....0..1..0..2....0..1..0..2....0..1..0..2
..1..2..0..1....1..2..0..2....1..3..1..3....2..0..2..3....3..2..2..1
..0..3..1..3....3..0..2..0....2..1..0..2....3..1..0..1....1..0..3..2
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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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