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%I #4 Mar 14 2013 17:16:38
%S 0,280,13416,737254,40395409,2222762597,123093376161,6858519798139,
%T 384184470564745,21618570758835696,1221246943086629366,
%U 69219708062618487810,3934674396591601892887,224222135757151794516896
%N Number of 4Xn 0..2 arrays with exactly floor(4Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order
%C Row 4 of A223104
%H R. H. Hardin, <a href="/A223107/b223107.txt">Table of n, a(n) for n = 1..25</a>
%e Some solutions for n=3
%e ..0..1..2....0..1..1....0..0..1....0..1..2....0..1..0....0..0..1....0..1..2
%e ..1..2..0....0..1..0....1..0..2....2..2..0....0..0..0....1..0..1....0..2..1
%e ..0..1..0....0..1..0....1..2..1....2..1..2....2..1..0....2..1..1....0..0..1
%e ..1..2..1....2..2..2....0..2..2....1..0..1....1..2..1....1..2..1....1..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 14 2013
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