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A207435 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.

%I A207435 #9 Jul 22 2025 20:25:54
%S A207435 2,16,108,1360,41092,2405923,284247216,68394049216,33064776069834,
%T A207435 31868588102983450,61446275576502856313,236673591523285699197386,
%U A207435 1818567731722871472685169098,27879399799936252965503867197417
%N A207435 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically.
%C A207435 Diagonal of A207442
%H A207435 R, H. Hardin, <a href="/A207435/b207435.txt">Table of n, a(n) for n = 1..19</a>
%e A207435 Some solutions for n=4
%e A207435 ..1..1..1..0....1..0..0..0....0..0..0..0....1..1..0..1....1..1..0..1
%e A207435 ..0..1..1..1....0..1..1..1....1..1..0..1....0..1..1..1....1..0..1..1
%e A207435 ..1..1..1..0....1..0..0..0....0..0..0..0....1..0..0..0....0..1..1..1
%e A207435 ..0..1..1..1....0..1..1..1....1..1..0..1....1..1..1..1....1..1..0..0
%K A207435 nonn
%O A207435 1,1
%A A207435 _R. H. Hardin_ Feb 17 2012