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A208197
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Number of nX4 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors
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1
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15, 2653, 639701, 156617480, 38372808893, 9402035642924, 2303673397508915, 564442821781056268, 138298988287411669755, 33885824084409470445384, 8302657077306720410135797, 2034305388933816797435987804
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OFFSET
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1,1
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COMMENTS
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Column 4 of A208201
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 236*a(n-1) +2368*a(n-2) -37526*a(n-3) -310734*a(n-4) +811712*a(n-5) +1791667*a(n-6) -2516274*a(n-7) -1895184*a(n-8) +2138400*a(n-9) -373248*a(n-10) for n>11
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EXAMPLE
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Some solutions for n=4
..0..0..0..1....0..0..0..1....0..1..1..0....0..0..0..1....0..0..0..0
..0..1..1..0....1..1..0..0....0..0..2..0....0..1..0..2....0..1..1..2
..0..1..2..3....2..3..3..0....0..2..1..1....2..1..0..3....1..0..1..3
..3..0..3..1....0..2..1..3....3..1..0..0....1..0..1..0....1..3..3..1
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CROSSREFS
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Sequence in context: A241116 A126678 A340185 * A232407 A208404 A208411
Adjacent sequences: A208194 A208195 A208196 * A208198 A208199 A208200
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Feb 24 2012
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STATUS
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approved
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