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A240785
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Number of 4Xn 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order
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1
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8, 34, 97, 305, 959, 3033, 9581, 30354, 96122, 304551, 964960, 3057691, 9689250, 30704176, 97298863, 308333649, 977091497, 3096352093, 9812187127, 31094352992, 98536547134, 312257747281, 989530396718, 3135776321313, 9937131194560
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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) = 6*a(n-1) -11*a(n-2) +7*a(n-3) -10*a(n-5) +13*a(n-6) -3*a(n-7) +27*a(n-8) -44*a(n-9) +13*a(n-10) +5*a(n-11) -8*a(n-12) +8*a(n-13) -3*a(n-14) +a(n-15)
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EXAMPLE
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Some solutions for n=4
..0..0..1..0....0..1..1..0....0..1..0..1....0..0..1..0....0..1..0..1
..0..0..1..1....1..1..1..0....1..1..0..1....0..0..1..0....0..1..1..0
..1..0..0..1....1..1..0..1....1..1..0..1....1..1..0..0....0..1..1..1
..1..0..0..1....0..1..0..1....1..0..1..0....1..1..0..0....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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