A208162 - OEIS

%I #5 Mar 31 2012 12:37:22

%S 19,361,1799,9039,55576,297702,1493661,7719181,39409874,196757286,

%T 981006372,4882898447,24159299179,119208331512,587545141168,

%U 2890792469683,14204090068621,69742665957409,342219461884514

%N Number of nX6 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 0 1 0 vertically

%C Column 6 of A208164

%H R. H. Hardin, <a href="/A208162/b208162.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..1..1..0..0..1..1....1..1..1..1..1..1....1..1..1..0..0..1....0..1..1..1..1..1

%e ..0..0..1..0..0..1....1..0..0..1..0..0....1..0..0..1..0..0....0..0..1..1..1..1

%e ..0..1..1..0..0..1....0..0..1..1..0..0....0..1..1..1..0..0....0..1..1..1..1..1

%e ..0..1..1..0..0..1....0..0..1..1..0..0....1..1..1..1..0..0....0..1..1..1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 24 2012