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A224582
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Number of (n+6)X8 0..1 matrices with each 7X7 subblock idempotent
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1
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164935, 26918, 22928, 24643, 26542, 27611, 28629, 29006, 34239, 43678, 55912, 70122, 87081, 104589, 122291, 144899, 177217, 221460, 280369, 355102, 447725, 558187, 690822, 854927, 1064482, 1332274, 1674432, 2108903, 2654002, 3331481
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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) = 3*a(n-1) -5*a(n-2) +7*a(n-3) -9*a(n-4) +11*a(n-5) -12*a(n-6) +13*a(n-7) -13*a(n-8) +12*a(n-9) -10*a(n-10) +7*a(n-11) -4*a(n-12) +3*a(n-14) -6*a(n-15) +8*a(n-16) -10*a(n-17) +11*a(n-18) -11*a(n-19) +11*a(n-20) -10*a(n-21) +9*a(n-22) -7*a(n-23) +6*a(n-24) -5*a(n-25) +4*a(n-26) -3*a(n-27) +2*a(n-28) -a(n-29) for n>39
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EXAMPLE
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Some solutions for n=2
..1..0..0..0..0..0..0..0....1..1..1..1..1..0..0..1....1..1..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..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....0..0..1..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..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..0..0..0..0..0
..0..0..0..0..0..0..0..1....1..1..1..1..0..0..1..1....0..1..0..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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