%I #4 Mar 11 2013 13:46:12
%S 4,10,24,117,284,1673,4429,26552,72934,442065,1235006,7532763,
%T 21256771,130255369,370176224,2276294040,6503070384,40098304454,
%U 115024311048,710794645074,2045650165772,12663624563666,36543679573017
%N Number of 3Xn 0..1 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order
%C Row 3 of A223012
%H R. H. Hardin, <a href="/A223014/b223014.txt">Table of n, a(n) for n = 1..48</a>
%e Some solutions for n=3
%e ..0..1..0....0..0..0....0..0..1....0..0..0....0..1..0....0..0..0....0..0..0
%e ..1..1..1....0..0..1....1..1..1....0..0..1....0..0..0....1..1..1....0..1..1
%e ..1..1..1....1..1..1....1..1..1....0..0..1....0..0..0....1..1..1....1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 11 2013