A207087 - OEIS

%I #5 Mar 31 2012 12:37:15

%S 81,6561,248525,8244759,243794389,6897033117,189659424011,

%T 5142718466575,138294979168509,3702335938084439,98860585328779343,

%U 2635998227067669263,70227731343750962247,1870120121498081593459,49786813201495602614131

%N Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically

%C Column 7 of A207088

%H R. H. Hardin, <a href="/A207087/b207087.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 15 2012