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A237029
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Number of (n+1) X (2+1) 0..2 arrays with the maximum of every 2 X 2 subblock equal.
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1
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563, 11205, 221994, 4552617, 93224611, 1918085364, 39451935691, 811987649749, 16711113378122, 343953320541489, 7079284019757859, 145708327358170052, 2999015488433549923, 61726799222630392869, 1270482524400967939690
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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) = 22*a(n-1) +31*a(n-2) -1351*a(n-3) +2166*a(n-4) +3313*a(n-5) -5940*a(n-6) +1760*a(n-7).
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EXAMPLE
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Some solutions for n=2:
..1..0..0....2..1..2....0..2..1....0..1..1....0..2..2....0..1..2....1..0..2
..1..0..1....2..0..2....1..0..2....2..0..2....0..0..0....1..2..1....2..2..0
..1..1..1....2..1..2....0..2..1....0..1..0....1..2..0....1..0..1....0..2..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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