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%I #4 Feb 28 2013 17:00:44
%S 3,18,220,3189,47696,723244,11082863,171281610,2665243912,41702927217,
%T 655500979620,10342682216196,163717383474715,2598721367092734,
%U 41349332751064456,659312336958352181,10532234884132194040
%N Number of nX4 0..2 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order
%C Column 4 of A222690
%H R. H. Hardin, <a href="/A222686/b222686.txt">Table of n, a(n) for n = 1..183</a>
%e Some solutions for n=3
%e ..0..0..1..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1
%e ..1..2..2..2....1..2..0..0....0..0..0..1....0..0..1..0....0..2..0..0
%e ..2..2..2..2....0..0..0..0....1..2..2..2....0..0..1..1....0..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 28 2013
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