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%I #7 Dec 18 2015 18:17:59
%S 3,81,15712,23335217,262482902920,22540704363210913,
%T 14777630573426014735558,74010398585294927963749126971,
%U 2831737193779046594636895038867701496
%N Number of n X n 0..2 arrays avoiding the pattern z-2 z-1 z in any row or column
%C Diagonal of A206700
%H R. H. Hardin, <a href="/A206693/b206693.txt">Table of n, a(n) for n = 1..10</a>
%e Some solutions for n=4
%e ..0..2..2..0....2..0..0..0....2..0..0..1....0..2..0..1....2..1..0..2
%e ..1..0..0..0....0..1..1..0....1..1..0..1....2..0..1..0....1..1..1..2
%e ..0..2..1..2....0..1..0..2....2..0..1..0....0..2..1..1....1..1..0..1
%e ..0..0..0..0....2..2..0..1....1..1..0..0....2..0..0..1....1..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 11 2012
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