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A207688 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically.

%I A207688 #9 May 04 2021 15:31:37
%S A207688 2,16,60,256,1872,15376,145200,1887876,32939236,653211364,16761239040,
%T A207688 557862597604,24505820603880,1374667445474064,89177394083197716,
%U A207688 7769360160391840000,912190244879661701508,129010731422391263108196
%N A207688 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically.
%C A207688 Diagonal of A207693.
%H A207688 R. H. Hardin, <a href="/A207688/b207688.txt">Table of n, a(n) for n = 1..19</a>
%e A207688 Some solutions for n=4
%e A207688 ..1..1..0..1....1..1..1..0....1..1..1..1....1..1..0..1....1..0..0..1
%e A207688 ..1..1..1..0....1..0..0..1....0..0..1..1....0..0..1..1....0..1..1..0
%e A207688 ..0..0..1..1....0..1..1..0....1..1..0..0....1..1..0..0....1..0..0..1
%e A207688 ..1..1..0..0....1..0..1..1....1..1..0..0....0..1..1..0....0..1..1..0
%Y A207688 Cf. A207693.
%K A207688 nonn
%O A207688 1,1
%A A207688 _R. H. Hardin_ Feb 19 2012