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A237333
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Number of (n+1)X(1+1) 0..3 arrays with the maximum minus the minimum of every 2X2 subblock equal
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1
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256, 1980, 15082, 120808, 972356, 7935194, 65088736, 536949612, 4446049514, 36942292664, 307835761076, 2571906893178, 21538160121328, 180756078794140, 1519926867217162, 12803364991634568, 108025697029512484
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OFFSET
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1,1
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COMMENTS
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Column 1 of A237340
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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) = 15*a(n-1) -17*a(n-2) -518*a(n-3) +1159*a(n-4) +5713*a(n-5) -11569*a(n-6) -22194*a(n-7) +35356*a(n-8) +29720*a(n-9) -34208*a(n-10) -11136*a(n-11) +7680*a(n-12)
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EXAMPLE
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Some solutions for n=4
..1..3....2..0....2..3....0..0....0..2....2..1....0..1....2..1....2..1....2..1
..3..2....3..3....0..2....0..3....2..0....0..2....2..3....1..0....0..0....3..0
..2..1....0..0....0..3....3..3....1..2....0..2....1..0....2..1....2..2....3..2
..0..0....3..0....0..2....3..0....1..3....1..2....0..3....2..0....0..2....0..3
..2..2....3..0....2..3....0..0....3..1....2..3....0..0....2..1....0..2....2..0
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CROSSREFS
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Sequence in context: A205659 A205363 A237340 * A221487 A014711 A236451
Adjacent sequences: A237330 A237331 A237332 * A237334 A237335 A237336
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 06 2014
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STATUS
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approved
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