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A233110
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Number of nX5 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order
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1
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99, 123352, 189286871, 294285758398, 457873555330159, 712427482567592092, 1108502928092713640626, 1724777533707727108574193, 2683671364004795423834363994, 4175664311828036646078204783047
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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) = 1903*a(n-1) -587832*a(n-2) +77760886*a(n-3) -5287016185*a(n-4) +188909127665*a(n-5) -3121291574501*a(n-6) +5961157912045*a(n-7) +488488284983722*a(n-8) -6216213294870140*a(n-9) +30096051456844829*a(n-10) -50425593642643659*a(n-11) -57028414169574032*a(n-12) +289749791197635300*a(n-13) -320983517286000000*a(n-14) +114316383888000000*a(n-15)
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EXAMPLE
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Some solutions for n=2
..0..0..1..5..2....0..1..5..4..0....0..1..1..1..2....0..1..0..1..5
..0..3..5..5..2....0..0..2..0..1....1..5..5..2..5....2..1..0..0..3
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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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