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%I #6 Dec 18 2015 18:18:43
%S 0,9,45,15129,14082255,114228452529,5392746297039195,
%T 1669550033290419884241,3264068813720842706362349013,
%U 40741287160388602906800646716513609
%N Number of n X n 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 Diagonal of A230068
%H R. H. Hardin, <a href="/A230062/b230062.txt">Table of n, a(n) for n = 1..12</a>
%e Some solutions for n=4
%e ..2..1..1..1....0..2..2..2....2..0..2..1....2..1..1..0....1..0..0..1
%e ..1..0..1..1....0..2..0..0....2..0..1..2....1..0..2..1....2..1..1..2
%e ..1..0..2..1....2..0..2..2....0..1..0..1....2..0..1..2....2..2..1..0
%e ..2..1..1..0....2..0..2..0....1..2..1..2....2..0..0..1....0..0..2..1
%K nonn
%O 1,2
%A _R. H. Hardin_, Oct 08 2013
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