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A251404
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Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock summing to a prime
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1
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238, 2164, 19654, 179400, 1634286, 14919346, 136033976, 1241601558, 11324851298, 103347731602, 942800497790, 8602989816444, 78487649036798, 716159657613444, 6533986460840950, 59617758968511628, 543941703260044888
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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) = 8*a(n-1) +60*a(n-2) -452*a(n-3) -649*a(n-4) +5937*a(n-5) +916*a(n-6) -23417*a(n-7) +4582*a(n-8) +26384*a(n-9) -7348*a(n-10) -1208*a(n-11) +48*a(n-12)
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EXAMPLE
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Some solutions for n=4
..0..1..1....1..0..0....0..2..0....0..2..0....0..2..1....0..1..0....0..2..0
..1..0..1....2..0..2....2..1..2....1..2..1....2..1..1....2..0..1....2..1..2
..0..2..2....2..1..2....0..2..0....1..1..1....2..0..0....1..0..2....1..1..1
..1..0..1....2..2..0....0..1..2....1..0..1....0..1..1....0..1..2....1..0..0
..1..0..1....0..1..0....0..1..1....0..1..1....1..1..2....2..2..0....1..1..2
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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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