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A201700
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T(n,k)=Number of nXk 0..2 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards
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7
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3, 3, 3, 3, 10, 3, 3, 18, 18, 3, 3, 27, 116, 27, 3, 3, 37, 395, 395, 37, 3, 3, 48, 989, 4998, 989, 48, 3, 3, 60, 2068, 35390, 35390, 2068, 60, 3, 3, 73, 3838, 167625, 930564, 167625, 3838, 73, 3, 3, 87, 6541, 607919, 14268351, 14268351, 607919, 6541, 87, 3, 3, 102
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OFFSET
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1,1
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COMMENTS
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Table starts
.3...3.....3........3...........3..............3...............3
.3..10....18.......27..........37.............48..............60
.3..18...116......395.........989...........2068............3838
.3..27...395.....4998.......35390.........167625..........607919
.3..37...989....35390......930564.......14268351.......142436489
.3..48..2068...167625....14268351......795339012.....27102769900
.3..60..3838...607919...142436489....27102769900...3262897246338
.3..73..6541..1826778..1034563890...615440785548.253484699853930
.3..87.10455..4775228..5898023820.10106227864338
.3.102.15894.11211034.27803725006
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LINKS
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EXAMPLE
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Some solutions for n=5 k=3
..0..0..2....0..0..2....0..2..2....0..1..2....0..1..2....0..2..2....0..1..2
..0..2..1....0..0..2....0..2..2....1..0..2....1..0..1....0..2..2....0..2..0
..2..0..1....0..1..0....2..1..2....1..0..2....1..0..1....1..0..2....0..2..0
..2..0..1....1..0..0....2..1..2....1..0..2....1..0..1....1..1..0....1..1..0
..2..2..0....1..0..0....2..2..1....2..2..1....1..1..0....2..0..0....2..0..0
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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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