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A207164 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.

%I A207164 #9 Jan 16 2024 10:26:30
%S A207164 2,16,90,603,3445,15789,98224,645217,3227100,18747520,128798244,
%T A207164 720878886,4180036645,28917238756,176708726320,1057330250552,
%U A207164 7322809072734,47678383274385,297647051017140,2072720881428948
%N A207164 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.
%C A207164 Diagonal of A207169.
%H A207164 R. H. Hardin, <a href="/A207164/b207164.txt">Table of n, a(n) for n = 1..27</a>
%e A207164 Some solutions for n=4
%e A207164 ..1..0..0..1....1..1..0..0....0..0..1..0....1..1..1..1....0..1..1..1
%e A207164 ..0..1..1..1....1..0..0..1....1..1..1..1....0..1..1..1....0..1..0..0
%e A207164 ..0..0..1..1....1..0..0..1....0..0..1..1....0..1..1..0....0..1..0..0
%e A207164 ..0..0..1..0....1..0..0..1....0..0..1..1....0..0..1..0....0..1..0..0
%Y A207164 Cf. A207169.
%K A207164 nonn
%O A207164 1,1
%A A207164 _R. H. Hardin_, Feb 15 2012