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A210832
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Number of (n+1)X(n+1) 0..3 symmetric matrices with every 2X2 subblock having one, two or three distinct values, and new values 0..3 introduced in lower triangle row major order
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1
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5, 171, 33003, 25302763, 71285876395, 732967188022763, 27496666418419018091, 3763456875799574658077867, 1879339285974060290837281959275, 3424008152076665406983529256359040747
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OFFSET
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1,1
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LINKS
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EXAMPLE
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Some solutions for n=3
..0..1..3..0....0..1..1..2....0..1..1..3....0..1..2..0....0..1..2..0
..1..2..3..0....1..2..3..1....1..2..2..3....1..2..3..0....1..0..2..2
..3..3..3..2....1..3..3..3....1..2..2..2....2..3..0..3....2..2..3..0
..0..0..2..3....2..1..3..3....3..3..2..1....0..0..3..2....0..2..0..3
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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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