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A222842
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T(n,k)=Number of nXk 0..3 arrays with no more than floor(nXk/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order
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4
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1, 1, 1, 2, 8, 2, 11, 105, 105, 11, 34, 1585, 4797, 1585, 34, 131, 23107, 326408, 326408, 23107, 131, 438, 353631, 15364848, 70144361, 15364848, 353631, 438, 2150, 5338646, 1077545438, 15371324917, 15371324917, 1077545438, 5338646, 2150, 7676
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OFFSET
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1,4
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COMMENTS
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Table starts
.....1..........1.............2..............11................34
.....1..........8...........105............1585.............23107
.....2........105..........4797..........326408..........15364848
....11.......1585........326408........70144361.......15371324917
....34......23107......15364848.....15371324917....10720259944904
...131.....353631....1077545438...3410802057085.11000375151330544
...438....5338646...52487425596.763478480305913
..2150...81874696.3689615795056
..7676.1252153841
.32491
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LINKS
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EXAMPLE
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Some solutions for n=3 k=4
..0..1..0..2....0..1..0..1....0..1..0..2....0..1..0..0....0..1..1..2
..3..0..3..2....1..2..1..0....0..0..2..2....2..2..0..1....1..0..2..3
..2..1..3..0....0..1..2..2....2..1..0..3....3..0..1..0....0..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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