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%I #4 Jan 30 2014 07:05:14
%S 81,345,1497,6663,29617,132471,592001,2651151,11872153,53217175,
%T 238621713,1070656959,4805940169,21584396967,96984517953,435991819343,
%U 1960896534009,8823336533943,39719697816561,178884059892959
%N Number of (n+1)X(1+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock equal
%C Column 1 of A236737
%H R. H. Hardin, <a href="/A236730/b236730.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 9*a(n-1) -9*a(n-2) -109*a(n-3) +254*a(n-4) +260*a(n-5) -1156*a(n-6) +576*a(n-7) +944*a(n-8) -1024*a(n-9) +256*a(n-10)
%e Some solutions for n=5
%e ..2..1....0..0....1..0....0..2....0..1....2..0....2..0....0..2....0..1....0..1
%e ..2..0....1..2....0..0....1..2....1..1....1..2....1..0....0..0....1..1....2..1
%e ..0..1....2..0....0..0....2..1....1..0....0..0....0..1....0..0....1..2....1..0
%e ..2..2....2..1....0..0....2..0....0..0....1..2....1..0....1..0....1..1....1..1
%e ..0..1....2..1....2..0....1..2....0..2....1..2....0..1....1..2....2..1....2..1
%e ..2..0....1..2....0..0....1..2....1..1....0..0....0..1....0..1....1..0....1..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 30 2014
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