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A204796
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Number of (n+1)X5 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing
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1
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335, 4273, 42214, 422426, 4122638, 40446826, 398104735, 3932835872, 38891469208, 384807201698, 3808018050290, 37687209766746, 372993505199870, 3691609000397802, 36536979984636766, 361618824026138898
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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) = 23*a(n-1) -169*a(n-2) +215*a(n-3) +2942*a(n-4) -13270*a(n-5) +5608*a(n-6) +79132*a(n-7) -156472*a(n-8) -56040*a(n-9) +403184*a(n-10) -196800*a(n-11) -346880*a(n-12) +287744*a(n-13) +89088*a(n-14) -98304*a(n-15) for n>23
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EXAMPLE
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Some solutions for n=4
..1..0..0..0..0....0..0..1..0..1....0..0..0..0..0....0..0..1..0..0
..1..0..1..0..1....1..0..0..0..1....0..0..0..1..1....1..0..0..0..0
..1..0..1..0..1....1..0..0..0..1....1..1..0..1..1....0..0..0..0..1
..0..0..0..0..0....0..0..1..0..1....0..0..0..1..1....1..0..0..0..0
..1..1..1..1..0....1..0..0..0..1....0..0..0..0..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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