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A207448 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 1 vertically.

%I A207448 #9 Jul 22 2025 20:27:16
%S A207448 2,16,90,760,5200,46956,370734,3599104,31807710,329885620,3198732768,
%T A207448 35206521816,369188811082,4287997640080,48104913781890,
%U A207448 586813738039904,6984278125524784,89124296743065348,1118012637781250310
%N A207448 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 1 vertically.
%C A207448 Diagonal of A207453
%H A207448 R, H. Hardin, <a href="/A207448/b207448.txt">Table of n, a(n) for n = 1..39</a>
%e A207448 Some solutions for n=5
%e A207448 ..0..1..1..1..1....0..1..1..1..1....0..1..0..1..0....1..0..1..1..1
%e A207448 ..0..1..0..1..1....0..1..0..1..0....1..1..0..1..0....1..0..1..1..1
%e A207448 ..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....1..0..1..0..0
%e A207448 ..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....1..0..1..0..0
%e A207448 ..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....1..0..1..0..0
%K A207448 nonn
%O A207448 1,1
%A A207448 _R. H. Hardin_ Feb 17 2012