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A208683 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically.

%I A208683 #9 May 04 2021 15:41:32
%S A208683 2,16,78,927,12096,301035,6398617,358035204,14996975204,1866358422700,
%T A208683 142488171799491,43994512655386488,5996882020078059149,
%U A208683 4716359423241404452425,1123534623785504112746542
%N A208683 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 0 1 vertically.
%C A208683 Diagonal of A208688.
%H A208683 R. H. Hardin, <a href="/A208683/b208683.txt">Table of n, a(n) for n = 1..37</a>
%e A208683 Some solutions for n=4
%e A208683 ..0..1..1..0....0..1..1..1....0..1..0..0....1..0..1..0....0..1..1..0
%e A208683 ..1..1..0..1....0..1..1..0....1..1..1..0....1..1..1..1....0..1..1..0
%e A208683 ..0..1..0..0....1..1..0..0....0..1..0..1....1..0..1..0....1..1..0..1
%e A208683 ..0..1..0..0....0..1..0..1....0..1..0..0....1..0..1..0....0..1..0..0
%Y A208683 Cf. A208688.
%K A208683 nonn
%O A208683 1,1
%A A208683 _R. H. Hardin_ Mar 01 2012