%I #6 Dec 18 2015 18:18:47
%S 1,9,582,164495,194998895,975239425635,20656955820980290,
%T 1857471420698911806909,710147877110621514637926027,
%U 1155599363385647621950232861908393
%N Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 in row major order
%C Diagonal of A233073
%H R. H. Hardin, <a href="/A233067/b233067.txt">Table of n, a(n) for n = 1..11</a>
%e Some solutions for n=4
%e ..0..0..1..0....0..0..0..1....0..0..1..0....0..0..1..3....0..1..0..0
%e ..0..0..0..2....0..0..0..0....0..1..1..0....1..1..1..1....0..1..1..1
%e ..0..0..2..3....0..2..2..2....1..1..1..1....3..1..3..3....1..0..1..1
%e ..0..2..3..1....0..2..3..2....0..1..1..3....3..1..3..1....1..1..1..0
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 03 2013
