A207899 - OEIS

%I #5 Mar 31 2012 12:37:20

%S 26,676,2812,12040,49442,205258,856480,3559040,14795830,61589756,

%T 256239484,1065818440,4434375632,18449465050,76753459760,319315656274,

%U 1328477921238,5526925286486,22993687059966,95661297604612

%N Number of 6Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically

%C Row 6 of A207895

%H R. H. Hardin, <a href="/A207899/b207899.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 21 2012