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A233214
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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 antidiagonally, 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, 147019, 268289572, 496475792293, 919538740854193, 1703198747507336644, 3154729081272072714436, 5843309615312787017886631, 10823201236481602133281929223, 20047146704348600802295758187282
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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) = 1975*a(n-1) -228357*a(n-2) +1804281*a(n-3) -4170978*a(n-4) +2593080*a(n-5)
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EXAMPLE
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Some solutions for n=2
..0..1..0..4..2....0..1..2..2..1....0..0..1..1..2....0..0..1..0..2
..5..2..2..5..4....1..0..0..0..4....3..0..3..4..3....1..3..3..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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