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A253350
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T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally
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14
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16, 47, 47, 125, 173, 125, 335, 724, 735, 335, 907, 3160, 4800, 3192, 907, 2470, 13810, 31156, 30920, 13917, 2470, 6740, 60368, 200740, 305872, 199512, 60779, 6740, 18406, 263920, 1294016, 3006936, 3013228, 1285960, 265605, 18406, 50278, 1153880
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OFFSET
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1,1
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COMMENTS
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Table starts
.....16.......47........125..........335............907.............2470
.....47......173........724.........3160..........13810............60368
....125......735.......4800........31156.........200740..........1294016
....335.....3192......30920.......305872........3006936.........29746140
....907....13917.....199512......3013228.......44555528........665370612
...2470....60779....1285960.....29779356......664592224......15101198444
...6740...265605....8289288....294392852.....9887498224.....340936886060
..18406..1161035...53433608...2912660356...147292687568....7720152604732
..50278..5075841..344449224..28819853684..2193102920288..174647893015868
.137354.22191959.2220470152.285212776212.32661849908016.3953303875494396
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LINKS
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FORMULA
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Empirical for column k:
k=1: a(n) = 3*a(n-1) -2*a(n-3) for n>6
k=2: a(n) = 6*a(n-1) -5*a(n-2) -12*a(n-3) +12*a(n-4) for n>6
k=3: [order 7] for n>8
k=4: [order 11] for n>14
k=5: [order 23] for n>25
k=6: [order 43] for n>46
k=7: [order 84] for n>87
Empirical for row n:
n=1: a(n) = 3*a(n-1) -2*a(n-3) for n>6
n=2: a(n) = 5*a(n-1) -12*a(n-3) for n>6
n=3: [order 7] for n>10
n=4: [order 11] for n>15
n=5: [order 23] for n>26
n=6: [order 43] for n>47
n=7: [order 84] for n>88
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EXAMPLE
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Some solutions for n=3 k=4
..1..0..0..1..1....0..1..0..0..0....0..1..1..1..1....1..1..1..1..1
..1..1..1..1..0....1..1..1..1..1....1..1..1..0..0....0..0..0..1..0
..1..1..1..1..1....1..1..1..1..1....1..1..1..1..1....1..1..1..1..0
..0..0..0..1..0....0..0..1..0..1....0..0..0..0..0....0..0..1..1..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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