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A208008 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 1 vertically.

%I A208008 #9 Jan 02 2024 00:36:55
%S A208008 2,16,90,841,5952,43264,393049,4084441,32673396,334012176,3665311664,
%T A208008 37536737536,385814058880,4801282939489,53629177761313,
%U A208008 628423124320161,7905277739708518,101862335149216849,1250237739999352500
%N A208008 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 1 vertically.
%C A208008 Diagonal of A208013.
%H A208008 R. H. Hardin, <a href="/A208008/b208008.txt">Table of n, a(n) for n = 1..25</a>
%e A208008 Some solutions for n=4
%e A208008 ..1..0..0..1....1..1..0..0....1..1..0..0....1..1..0..0....0..0..1..1
%e A208008 ..0..0..1..1....0..0..1..0....1..0..0..1....1..1..0..0....0..1..1..0
%e A208008 ..1..0..0..1....0..1..0..0....0..1..0..0....0..1..0..0....0..0..1..0
%e A208008 ..0..0..1..1....0..0..1..0....1..0..0..1....0..1..0..0....0..0..1..0
%Y A208008 Cf. A208013.
%K A208008 nonn
%O A208008 1,1
%A A208008 _R. H. Hardin_, Feb 22 2012