%I #4 Mar 09 2013 07:53:11

%S 4,25,373,7794,180203,4320431,105327353,2592612272,64243363904,

%T 1600125512239,40022606753953,1004596097977296,25292398905119297,

%U 638445931307999125,16152880969313405490,409495374971029069517

%N Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Column 4 of A222906

%H R. H. Hardin, <a href="/A222902/b222902.txt">Table of n, a(n) for n = 1..136</a>

%e Some solutions for n=3

%e ..0..0..1..1....0..1..0..1....0..0..0..0....0..0..0..0....0..0..0..0

%e ..0..0..2..2....1..1..1..1....0..0..0..0....0..0..1..0....1..0..0..0

%e ..2..2..2..2....1..1..1..1....0..1..0..0....1..1..1..1....0..0..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 09 2013