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A205622
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Number of (n+1)X5 0..2 arrays with every 2X2 subblock in a row having an equal number of equal diagonal or equal antidiagonal elements, adjacent rows differing in this number, and new values 0..2 introduced in row major order
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1
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770, 8004, 94116, 1103436, 13072068, 153531936, 1819019544, 21373648800, 253152022176, 2975505412608, 35231638122048, 414226627999488, 4903309297903872, 57664764519684096, 682417731549562368
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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) = 136*a(n-2) +64*a(n-3) -264*a(n-4) -384*a(n-5) -1920*a(n-6) -7168*a(n-8) for n>9
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EXAMPLE
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Some solutions for n=4
..0..0..0..0..1....0..0..0..0..1....0..1..1..1..2....0..0..0..0..0
..0..1..0..1..2....1..1..2..2..1....1..2..1..2..0....0..0..0..0..0
..0..1..0..1..0....0..1..1..2..2....1..0..0..2..1....0..1..0..1..0
..1..1..1..1..1....2..2..0..0..1....1..1..0..0..2....2..2..0..1..2
..2..2..2..0..2....2..1..2..0..0....0..2..2..1..1....0..2..2..0..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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