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A236990
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Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
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1
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81, 360, 1600, 7200, 32400, 144000, 640000, 2880000, 12960000, 57600000, 256000000, 1152000000, 5184000000, 23040000000, 102400000000, 460800000000, 2073600000000, 9216000000000, 40960000000000, 184320000000000
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OFFSET
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1,1
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COMMENTS
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Column 1 of A236997
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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) = 400*a(n-4)
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EXAMPLE
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Some solutions for n=5
..1..2....1..1....0..0....2..1....0..1....2..0....2..1....0..0....0..2....2..2
..2..1....0..1....1..1....0..2....2..0....0..1....0..0....0..2....2..1....1..1
..2..2....0..1....1..2....0..0....2..2....2..1....2..0....1..0....1..2....2..1
..1..1....0..0....0..1....1..2....1..2....0..2....2..1....1..2....2..2....0..1
..0..1....0..0....2..2....1..0....2..1....0..2....0..1....1..1....2..0....2..0
..1..2....1..0....2..2....2..0....2..2....1..2....1..1....0..2....1..2....1..1
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CROSSREFS
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Sequence in context: A236065 A206676 A205520 * A236058 A205513 A017378
Adjacent sequences: A236987 A236988 A236989 * A236991 A236992 A236993
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 02 2014
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STATUS
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approved
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