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%I #4 Feb 17 2014 08:02:43
%S 6064,61668,621780,6698520,70363916,735878108,7744640808,81468910084,
%T 855621962264,8992624643448,94515770797736,993327648282692,
%U 10439451695451992,109715564203291848,1153058256519031332
%N Number of (n+1)X(4+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
%C Column 4 of A238046
%H R. H. Hardin, <a href="/A238042/b238042.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..2..1..0..2..0....0..2..1..0..0....2..2..1..2..1....1..1..0..2..2
%e ..0..2..1..2..0....0..1..0..1..0....1..2..1..0..0....2..0..2..0..1
%e ..2..0..2..2..1....0..0..1..2..2....0..2..2..2..0....1..2..0..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 17 2014