%I
%S 64,8192,854473,72544970,5190742489,323797652462,18095156337973
%N Half the number of nX7 binary arrays with no 3X3 submatrix formed with any three rows and columns equal to JI
%C Column 7 of A213418
%e Some solutions for n=4
%e ..1..0..0..1..1..1..0....1..1..0..1..1..0..0....0..1..1..0..0..1..0
%e ..1..0..1..1..1..0..0....0..1..0..0..0..1..1....1..1..0..0..0..1..0
%e ..0..0..1..0..1..0..1....0..0..1..0..1..0..0....0..1..1..0..1..1..0
%e ..1..1..0..0..1..1..0....0..1..0..1..1..0..1....0..0..1..0..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ and _N. J. A. Sloane_ Jun 10 2012
