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A208063 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 1 vertically.

%I A208063 #9 Jul 22 2025 21:08:41
%S A208063 2,16,72,576,3696,26244,198000,1638400,12913840,117722500,1052059680,
%T A208063 10059287616,97769309736,1020075760144,10507456855392,116747852120064,
%U A208063 1295601058976256,15148523442518244,177995312325281880
%N A208063 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 1 vertically.
%C A208063 Diagonal of A208069
%H A208063 R. H. Hardin, <a href="/A208063/b208063.txt">Table of n, a(n) for n = 1..32</a>
%e A208063 Some solutions for n=4
%e A208063 ..1..0..1..1....1..0..0..1....1..1..0..1....1..0..0..1....1..1..0..1
%e A208063 ..0..0..1..1....1..1..0..1....1..1..0..1....0..1..1..0....0..1..0..1
%e A208063 ..0..0..1..1....1..0..0..1....1..1..0..1....1..0..0..1....1..0..0..1
%e A208063 ..0..0..1..1....1..0..0..1....1..0..0..1....0..1..1..0....0..1..0..1
%K A208063 nonn
%O A208063 1,1
%A A208063 _R. H. Hardin_ Feb 23 2012