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A224619
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Number of (n+4)X6 0..2 matrices with each 5X5 subblock idempotent
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1
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20465, 15354, 19596, 22081, 23453, 24252, 31702, 43635, 58076, 73708, 89988, 113491, 148896, 198454, 263524, 344683, 449230, 588930, 778104, 1032073, 1367122, 1806502, 2385414, 3153261, 4175034, 5531556, 7327326, 9701805, 12844004
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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) = 2*a(n-1) -a(n-2) +a(n-3) -a(n-4) -a(n-7) +a(n-8) -a(n-9) +a(n-10) +a(n-12) -a(n-13) for n>18
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EXAMPLE
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Some solutions for n=2
..1..1..1..1..0..0....1..0..0..0..0..2....1..0..0..0..0..0....1..1..2..2..0..1
..0..0..0..0..0..0....1..0..0..0..0..2....1..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....1..0..0..0..0..2....1..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....1..0..0..0..0..1....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..0....0..0..0..0..0..0
..0..1..0..2..1..1....0..0..0..0..0..1....2..0..0..0..0..0....2..1..1..0..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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