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A207803 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically.

%I A207803 #9 Apr 11 2022 13:15:49
%S A207803 2,16,102,1970,57184,3511534,388134978,82999241712,33304563708790,
%T A207803 25409866877400042,36648009080479725120,100161609586888545878490,
%U A207803 518205987191621802807914102,5077481011895003740693688753360
%N A207803 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically.
%C A207803 Diagonal of A207808.
%H A207803 R. H. Hardin, <a href="/A207803/b207803.txt">Table of n, a(n) for n = 1..20</a>
%e A207803 Some solutions for n=4
%e A207803 ..1..0..1..1....1..1..0..0....0..1..0..0....0..1..1..0....1..0..1..1
%e A207803 ..0..1..0..0....1..1..1..0....0..1..1..0....0..1..1..0....0..1..1..0
%e A207803 ..0..1..0..0....0..1..1..1....0..1..1..0....1..0..1..0....0..1..0..0
%e A207803 ..1..0..1..0....0..1..1..1....0..1..1..1....1..0..1..1....0..1..0..0
%Y A207803 Cf. A207808.
%K A207803 nonn
%O A207803 1,1
%A A207803 _R. H. Hardin_, Feb 20 2012