%I #5 Mar 31 2012 12:37:00
%S 0,16,256,11236,107584,3904576,76212900,1650959424,39031534096,
%T 864587548224,19412272036096,437675604807204,9849402103175716,
%U 221594251463336196,4988444738917091904,112294697209531469824
%N Number of nX4 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1
%C Column 4 of A204084
%H R. H. Hardin, <a href="/A204080/b204080.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..1..0..0..0....3..0..0..1....3..0..0..1....2..0..0..1....3..0..0..0
%e ..1..2..1..1....1..1..1..1....1..1..1..1....1..1..2..1....1..1..1..1
%e ..0..0..3..3....0..2..1..0....0..1..1..0....0..2..3..0....0..0..2..3
%e ..1..1..0..0....0..0..0..0....0..1..0..0....0..0..1..0....0..0..1..0
%e ..0..0..1..1....1..1..1..1....0..1..1..1....1..1..1..0....1..1..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 10 2012
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