%I #4 Feb 11 2014 17:44:47
%S 310,1524,7562,39236,201754,1033140,5302002,27377802,140907656,
%T 723464076,3719653604,19172131806,98659238520,507065229134,
%U 2608372320890,13432072024666,69112775082390,355397881712346,1828490598631476
%N Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one
%C Column 2 of A237703
%H R. H. Hardin, <a href="/A237697/b237697.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..0..2....0..1..1....1..2..1....2..2..1....2..0..0....2..0..1....1..1..0
%e ..1..2..0....0..1..0....2..1..0....2..1..2....0..1..1....1..0..1....0..0..2
%e ..1..1..2....1..1..2....0..1..1....2..1..1....2..1..1....2..1..1....1..0..0
%e ..1..0..1....0..2..1....2..2..1....1..0..1....2..0..2....0..2..1....0..1..0
%e ..1..2..2....1..0..1....2..1..2....2..2..1....2..2..1....0..2..0....1..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 11 2014