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A263056
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Number of (n+1)X(4+1) 0..1 arrays with each row and column not divisible by 3, read as a binary number with top and left being the most significant bits.
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1
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10, 895, 18390, 498597, 10416690, 232738767, 4880746710, 104100946101, 2185333961490, 46071984907935, 967423105276470, 20335923462641157, 427044510774483570, 8970161111918918127, 188372284635598141590
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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) = 21*a(n-1) +189*a(n-2) -3969*a(n-3) -10719*a(n-4) +225099*a(n-5) +250803*a(n-6) -5266863*a(n-7) -2527200*a(n-8) +53071200*a(n-9) +9062928*a(n-10) -190321488*a(n-11)
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EXAMPLE
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Some solutions for n=3
..1..0..0..1..1....0..0..0..1..0....0..0..1..1..1....0..0..0..0..1
..0..0..1..0..0....1..1..0..0..1....1..1..0..0..1....1..0..1..0..0
..1..1..0..1..0....1..1..1..0..0....0..1..0..1..1....0..1..1..1..0
..0..0..0..1..0....1..1..0..0..1....0..1..0..1..0....1..0..1..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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