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%I #4 Feb 25 2013 11:49:57
%S 4,18,112,1087,11442,128213,1471412,17068476,198654710,2328829654,
%T 27335961632,322535055233,3807753230632,45124599083917,
%U 535113331694641,6363369440619695,75729209656948170,903078623804307816
%N Number of nX4 0..2 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order
%C Column 4 of A222587
%H R. H. Hardin, <a href="/A222584/b222584.txt">Table of n, a(n) for n = 1..83</a>
%e Some solutions for n=3
%e ..0..1..1..1....0..0..0..0....0..1..1..1....0..0..0..0....0..0..0..1
%e ..2..1..1..1....1..0..0..0....0..0..1..1....0..0..0..1....0..0..0..0
%e ..0..1..1..1....0..2..0..0....0..1..1..1....0..0..0..1....0..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 25 2013