%I
%S 81,2152,122940,15828110,4174594857,2309067655254,2784288129137988,
%T 7531980120186764378
%N Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
%C Diagonal of A237730
%e Some solutions for n=3
%e ..0..1..1..1....1..0..1..1....1..2..2..2....0..2..1..1....0..1..1..1
%e ..2..1..0..0....2..0..1..1....0..2..1..0....2..0..2..0....0..1..0..0
%e ..0..0..1..0....1..1..1..2....0..2..1..0....1..2..0..1....2..0..1..0
%e ..0..2..2..1....1..0..0..2....2..1..1..1....2..2..1..0....0..0..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 12 2014
