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A224683
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Number of (n+4)X5 0..1 matrices with each 5X5 subblock idempotent
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1
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5682, 2351, 2662, 3465, 4405, 5385, 6713, 8897, 12393, 17893, 25853, 36869, 52253, 74230, 106404, 154071, 224107, 325892, 472847, 684866, 991959, 1438581, 2089095, 3035865, 4411494, 6407917, 9304859, 13510805, 19621025, 28500115, 41401620
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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) -2*a(n-4) +2*a(n-5) -a(n-7) -a(n-9) +a(n-10) -a(n-11) +a(n-12) for n>18
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EXAMPLE
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Some solutions for n=2
..1..1..0..1..1....1..0..0..0..0....1..0..1..1..0....1..0..1..1..1
..0..0..0..0..0....0..0..0..0..0....1..0..1..1..0....0..0..0..0..0
..0..1..1..1..0....0..1..1..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..1..1....0..0..0..0..0....0..0..0..0..0
..1..0..1..1..1....0..0..0..0..0....0..1..1..1..1....0..0..1..0..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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