%I #4 Mar 11 2013 13:45:34
%S 2,4,7,18,41,119,295,825,2060,5873,15234,42492,111787,313666,836575,
%T 2327389,6276477,17477473,47431027,131755956,359950638,999799707,
%U 2741682652,7613006585,20955577878,58193926348,160583108286,446091089120
%N Number of 2Xn 0..1 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order
%C Row 2 of A223012
%H R. H. Hardin, <a href="/A223013/b223013.txt">Table of n, a(n) for n = 1..107</a>
%e All solutions for n=3
%e ..0..0..0....0..0..1....0..1..1....0..0..0....0..0..0....0..0..0....0..0..1
%e ..0..0..1....0..0..0....1..1..1....0..0..0....1..0..0....0..1..1....1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 11 2013