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A261945
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Number of (3+1)X(n+1) 0..1 arrays with each row nonprime and column prime, read as a binary number with top and left being the most significant bits.
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0
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0, 5, 218, 746, 10906, 72186, 588090, 3656900, 26647829, 180803752, 1093944096, 6533839983, 43705331783
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..0..0..0..0....1..1..1..1..0....1..1..0..0..0....0..1..1..1..0
..0..1..1..1..1....1..0..0..0..0....1..0..1..0..0....1..0..1..0..0
..1..0..1..0..0....0..1..1..1..1....0..1..1..1..1....1..1..0..1..1
..0..1..1..1..1....1..1..1..1..0....1..1..1..1..0....1..1..1..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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