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A206232
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Number of (n+1)X3 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order
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1
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60, 256, 1136, 5728, 31652, 170728, 943584, 5175034, 28475596, 156707492, 861735284, 4742758462, 26087819020, 143545024690, 789722083016, 4344918701514, 23904948840000, 131519096655384, 723594734816028
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OFFSET
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1,1
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COMMENTS
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Column 2 of A206238
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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) = 3*a(n-1) +20*a(n-2) -14*a(n-3) -133*a(n-4) +95*a(n-5) +123*a(n-6) +9*a(n-7) -102*a(n-8) for n>10
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EXAMPLE
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Some solutions for n=4
..0..0..0....0..0..0....0..1..1....0..0..0....0..0..0....0..1..0....0..0..0
..1..2..1....1..2..1....2..3..3....1..2..1....1..2..3....0..1..1....1..2..1
..1..3..1....1..3..1....3..3..2....1..3..1....1..0..3....1..2..1....1..0..1
..1..0..1....1..0..1....0..0..3....1..2..1....1..2..3....1..1..2....1..2..1
..1..2..1....2..2..1....1..0..0....3..3..1....0..0..3....3..1..2....3..3..3
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CROSSREFS
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Sequence in context: A261970 A206144 A008428 * A075295 A189542 A134587
Adjacent sequences: A206229 A206230 A206231 * A206233 A206234 A206235
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Feb 05 2012
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STATUS
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approved
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