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A239155
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T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..3 introduced in row major order
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12
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1, 2, 1, 7, 2, 7, 24, 7, 55, 17, 88, 24, 868, 208, 96, 328, 88, 12159, 5775, 2778, 340, 1235, 328, 175471, 135766, 209839, 17050, 1639, 4668, 1235, 2519488, 3313304, 12844591, 2709568, 166531, 6623, 17675, 4668, 36221263, 80240064, 821135900, 330311070
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OFFSET
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1,2
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COMMENTS
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Table starts
....1.......2..........7...........24..............88................328
....1.......2..........7...........24..............88................328
....7......55........868........12159..........175471............2519488
...17.....208.......5775.......135766.........3313304...........80240064
...96....2778.....209839.....12844591.......821135900........52019283568
..340...17050....2709568....330311070.....42600989632......5427557363908
.1639..166531...63961519..18120156500...5469574400477...1628795409782566
.6623.1221727.1049404191.629468400383.407538214264758.259498303698165490
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LINKS
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FORMULA
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Empirical for column k:
k=1: a(n) = 4*a(n-1) +7*a(n-2) -26*a(n-3) +5*a(n-4) +14*a(n-5)
k=2: [order 14]
k=3: [order 9]
Empirical for row n:
n=1: a(n) = 4*a(n-1) +a(n-2) -6*a(n-3) -3*a(n-4)
n=2: a(n) = 4*a(n-1) +a(n-2) -6*a(n-3) -3*a(n-4)
n=3: a(n) = 14*a(n-1) +14*a(n-2) -124*a(n-3) -6*a(n-4) +90*a(n-5) -27*a(n-6)
n=4: [order 14]
n=5: [order 57]
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EXAMPLE
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Some solutions for n=4 k=4
..0..1..1..0..2....0..1..1..2..3....0..1..2..0..2....0..1..2..0..3
..0..1..1..0..2....0..1..1..2..3....0..1..2..0..2....0..1..2..0..3
..0..1..1..0..2....0..2..1..2..1....2..1..2..1..0....0..1..2..0..3
..0..3..1..3..1....3..2..0..0..1....2..0..1..1..0....1..2..1..2..3
..0..3..1..3..1....3..2..0..0..1....2..0..1..1..0....1..2..1..2..3
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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