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A262334
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Number of (n+3)X(2+3) 0..1 arrays with each row and column divisible by 9, read as a binary number with top and left being the most significant bits.
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1
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4, 16, 64, 225, 841, 3249, 12996, 51984, 207936, 829921, 3316041, 13256881, 53027524, 212110096, 848440384, 3393645025, 13574347081, 54296922289, 217187689156, 868750756624, 3475003026496, 13900004649441, 55600003684681
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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) = 6*a(n-1) -8*a(n-2) -8*a(n-3) +48*a(n-4) -64*a(n-5) +a(n-6) -6*a(n-7) +8*a(n-8) +8*a(n-9) -48*a(n-10) +64*a(n-11)
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EXAMPLE
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Some solutions for n=4
..1..0..0..1..0....0..1..0..0..1....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..1..0..0..1....0..1..0..0..1....1..1..0..1..1
..1..0..0..1..0....1..1..0..1..1....0..1..0..0..1....1..1..0..1..1
..0..0..0..0..0....1..0..0..1..0....0..1..0..0..1....0..0..0..0..0
..0..0..0..0..0....0..1..0..0..1....0..1..0..0..1....1..1..0..1..1
..0..0..0..0..0....1..0..0..1..0....0..1..0..0..1....1..1..0..1..1
..1..0..0..1..0....1..1..0..1..1....0..1..0..0..1....0..0..0..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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