%I
%S 0,6,20,685,5370,123410,1341616,25106526,321557310,5447475968,
%T 76079350800,1228204709225,17971182592538,283558808435910,
%U 4256630623481552,66474347415079345,1012439882213494794
%N Number of nX2 0..3 arrays with exactly floor(nX2/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order
%C Column 2 of A222747
%H R. H. Hardin, <a href="/A222741/b222741.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..0....0..1....0..1
%e ..2..0....0..0....1..1....2..2....1..1....1..1....0..1....0..1....1..1....0..0
%e ..0..0....0..2....2..0....2..1....0..1....2..3....1..1....0..1....0..2....0..1
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 04 2013
