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A230178 Number of n X n 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j).

%I A230178 #8 Jun 02 2025 08:42:02
%S A230178 0,9,231,73857,133265847,1576417829097,117863748242661711,
%T A230178 56231441027001164749647,170772883022204028026156020737,
%U A230178 3303166614870365380110300414534929643
%N A230178 Number of n X n 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j).
%C A230178 Diagonal of A230184
%H A230178 R. H. Hardin, <a href="/A230178/b230178.txt">Table of n, a(n) for n = 1..11</a>
%e A230178 Some solutions for n=3
%e A230178 ..1..1..1....1..1..2....1..1..1....2..0..1....2..0..0....2..0..2....0..2..2
%e A230178 ..1..2..0....1..0..2....1..1..0....2..1..1....0..2..2....1..1..1....2..0..2
%e A230178 ..0..2..0....2..1..1....1..2..0....1..1..1....2..0..2....1..2..0....2..1..1
%K A230178 nonn
%O A230178 1,2
%A A230178 _R. H. Hardin_, Oct 11 2013