%I #4 Mar 05 2013 03:05:39
%S 0,4,13,66,158,934,2446,14567,39972,240130,673665,4073862,11545686,
%T 70212506,200446066,1224207384,3512430906,21526789216,62001340484,
%U 381049009426,1100824791540,6780941436208,19637801359798,121196222602133
%N Number of 3Xn 0..1 arrays with exactly 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 A222769
%H R. H. Hardin, <a href="/A222771/b222771.txt">Table of n, a(n) for n = 1..48</a>
%e Some solutions for n=3
%e ..0..0..0....0..0..0....0..1..0....0..1..1....0..0..1....0..0..0....0..0..0
%e ..0..0..0....0..0..0....0..0..0....0..1..1....1..0..0....0..0..1....0..0..1
%e ..0..1..0....1..1..1....0..0..0....1..1..1....0..0..0....1..0..0....0..0..1
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 05 2013