%I #3 Mar 31 2012 12:35:08

%S 1,1,9,45,476,6933,199238,8764691,657200985,80295518797,

%T 16444907566268,5549422397331424,3112070848837147326

%N Number of n X n binary arrays with all ones connected only either three adjacent vertically or three adjacent horizontally.

%K nonn

%O 1,3

%A _R. H. Hardin_, Oct 17 2008