Search: id:a261944
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A261944
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Number of (2+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
0
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0, 2, 61, 147, 1215, 5826, 28021, 110420, 527295, 2326284, 9514894, 38982570, 165423942, 702887228, 2961470604, 11652281882, 46921585497, 193805455945
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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..1..0..1..0....0..1..1..1..1....0..1..0..1..0....1..1..1..1..0
..1..0..1..0..1....1..0..0..0..0....1..0..1..0..1....0..1..1..1..1
..1..1..0..1..1....0..1..1..1..1....0..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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