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A224571
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Number of (n+5)X7 0..1 matrices with each 6X6 subblock idempotent
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1
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18044, 5668, 5696, 6411, 7034, 7386, 7843, 9237, 11797, 15264, 19346, 23731, 28733, 34965, 43608, 55678, 71847, 92276, 117664, 149105, 189225, 241373, 309494, 397915, 511879, 657088, 842255, 1079523, 1384904, 1778583, 2286164, 2938752, 3776548
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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) -2*a(n-2) +2*a(n-3) -2*a(n-4) +3*a(n-5) -2*a(n-6) +a(n-7) -a(n-9) +a(n-10) -3*a(n-11) +3*a(n-12) -4*a(n-13) +3*a(n-14) -2*a(n-15) +2*a(n-16) -a(n-17) +a(n-18) +a(n-19) -a(n-20) +a(n-21) -a(n-22) +a(n-23) -a(n-24) for n>33
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EXAMPLE
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Some solutions for n=2
..1..0..0..0..0..0..0....1..1..1..0..1..0..1....1..0..0..0..0..0..0
..0..1..1..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....0..0..0..0..0..0..0....1..0..0..1..0..0..0
..0..1..1..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..0..0..0..0....0..0..0..1..0..0..0
..0..1..1..0..0..0..0....0..0..0..0..0..0..0....1..0..0..1..0..0..0
..0..0..0..0..0..0..1....1..0..1..0..0..1..1....0..0..0..0..0..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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