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Number of (n+1) X (1+1) 0..2 arrays with the minimum plus the maximum unequal to the lower median plus the upper median in every 2X2 2 X 2 subblock.
Column 1 of A235911
Empirical: a(n) = 2*a(n-1) + 20*a(n-2) - 8*a(n-3).
Empirical g.f.: 4*x*(12 + 41*x - 18*x^2) / (1 - 2*x - 20*x^2 + 8*x^3). - Colin Barker, Oct 20 2018
Some solutions for n=4:
Column 1 of A235911.
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R. H. Hardin, <a href="/A235904/b235904.txt">Table of n, a(n) for n = 1..210</a>
allocated for R. H. Hardin
Number of (n+1)X(1+1) 0..2 arrays with the minimum plus the maximum unequal to the lower median plus the upper median in every 2X2 subblock
48, 260, 1408, 7632, 41344, 224064, 1213952, 6578432, 35643392, 193143808, 1046528000, 5670785024, 30726979584, 166497435648, 902168182784, 4888469241856, 26488322654208, 143528684683264, 777716068515840
1,1
Column 1 of A235101
Empirical: a(n) = 2*a(n-1) +20*a(n-2) -8*a(n-3)
Some solutions for n=4
..2..1....0..0....2..0....1..2....0..1....2..0....2..2....2..1....2..2....2..2
..0..0....1..0....1..2....0..2....2..2....1..0....0..2....0..2....2..1....2..1
..0..1....2..0....0..2....1..2....1..0....0..2....1..2....0..1....2..0....1..1
..2..2....2..2....0..0....0..0....2..0....2..2....0..0....2..2....0..0....2..1
..1..2....0..1....1..2....2..1....2..2....0..2....0..1....0..1....1..2....0..2
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nonn
R. H. Hardin, Jan 16 2014
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