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A207248 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.

%I A207248 #9 Jul 22 2025 20:12:32
%S A207248 2,16,102,940,9072,101036,1231650,16436824,237255370,3684061372,
%T A207248 61152471648,1079792961548,20191392448058,398344602963240,
%U A207248 8263930584283206,179759826117751524,4089350929606635216
%N A207248 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.
%C A207248 Diagonal of A207254
%H A207248 R. H. Hardin, <a href="/A207248/b207248.txt">Table of n, a(n) for n = 1..70</a>
%e A207248 Some solutions for n=4
%e A207248 ..1..1..0..0....1..1..0..0....1..1..0..0....1..1..1..1....0..0..0..0
%e A207248 ..1..1..1..0....1..0..0..0....0..0..0..0....1..1..1..1....0..0..0..0
%e A207248 ..1..1..1..0....0..0..0..0....0..0..0..0....1..1..1..1....1..0..0..0
%e A207248 ..1..1..1..0....0..0..0..0....1..0..0..0....1..1..1..1....1..1..0..0
%K A207248 nonn
%O A207248 1,1
%A A207248 _R. H. Hardin_ Feb 16 2012