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%I #4 Oct 08 2013 07:23:07
%S 0,81,441,15129,281961,6487209,137945025,3020271849,65409597009,
%T 1422349620129,30882371810481,670905678011409,14572037106084249,
%U 316528933014939681,6875333045808325641,149340930039835655625
%N Number of nX4 0..2 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value 2-x(i,j)
%C Column 4 of A230068
%H R. H. Hardin, <a href="/A230064/b230064.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 17*a(n-1) +132*a(n-2) -633*a(n-3) -223*a(n-4) +1688*a(n-5) +49*a(n-6) -593*a(n-7) +68*a(n-8) +9*a(n-9) -a(n-10) for n>11
%e Some solutions for n=4
%e ..1..1..0..1....1..1..0..0....2..2..2..0....1..1..1..1....1..2..1..1
%e ..1..1..1..2....1..1..2..2....0..0..2..1....1..1..1..1....0..1..1..0
%e ..1..1..1..1....2..2..2..1....1..0..1..1....0..2..2..0....2..0..2..1
%e ..1..1..1..1....0..0..1..0....2..1..1..1....0..2..2..0....2..0..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_, Oct 08 2013
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