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A224720
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Number of (n+3)X(n+3) 0..2 matrices with each 4X4 subblock idempotent
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0
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2052, 1920, 3092, 3924, 4498, 7090, 11268, 16568, 22726, 32326, 47310, 69124, 98934, 141122, 202398, 291280, 417790, 597382, 853688, 1220732, 1744804, 2491066, 3553342, 5066576, 7221562, 10287590, 14646626, 20842212, 29645776
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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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EXAMPLE
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Some solutions for n=2
..1..0..0..0..1....1..1..2..2..2....1..1..0..0..0....0..0..0..0..0
..1..0..0..0..1....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..2....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..2..0..0..0..1....0..0..0..0..0....0..0..0..0..1....0..0..0..0..0
..1..0..0..0..1....1..2..1..1..1....0..0..0..0..1....0..0..1..1..1
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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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