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%I #4 Mar 04 2013 06:58:12
%S 0,6,32,657,7546,124363,1710608,26389570,386047246,5871176993,
%T 88003925336,1338216528014,20289648960772,309520117240045,
%U 4723512898829824,72313201073502649,1108352818885158958
%N Number of 2Xn 0..3 arrays with exactly floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order
%C Row 2 of A222747
%H R. H. Hardin, <a href="/A222749/b222749.txt">Table of n, a(n) for n = 1..60</a>
%e Some solutions for n=3
%e ..0..0..1....0..1..0....0..1..2....0..1..2....0..1..1....0..1..1....0..1..2
%e ..0..2..1....0..0..1....2..2..3....1..1..0....0..1..0....1..2..3....1..1..2
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 04 2013
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