A206876 - OEIS

%I #5 Mar 31 2012 12:37:14

%S 65,4225,78799,2841311,95207761,2805723059,90497940567,2863087460903,

%T 89499787923617,2831117517162739,89219013685261269,

%U 2809084210921214817,88579091493698602265,2791355238871425908621,87960857432849796359965

%N Number of 7Xn 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically

%C Row 7 of A206871

%H R. H. Hardin, <a href="/A206876/b206876.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 13 2012