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%I #4 Mar 11 2013 13:42:06
%S 4,18,117,840,6240,47139,360347,2779528,21588898,168613534,1322868729,
%T 10417760419,82302522544,651981307285,5177047812119,41193230296706,
%U 328367767613750,2621791862367316,20963552382355484,167840827307586780
%N Number of nX4 0..1 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order
%C Column 4 of A223012
%H R. H. Hardin, <a href="/A223008/b223008.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..0..0..1..0....0..0..0..0....0..0..1..1....0..0..0..0....0..0..0..0
%e ..1..1..1..1....0..0..0..0....0..1..1..1....0..0..0..1....0..0..0..0
%e ..1..1..1..1....1..1..0..1....1..1..1..0....1..1..1..1....0..1..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 11 2013
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