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

%S 1,5,25,314,7358,349511,32855368,6141909014,2284689480141,

%T 1689669248970784,2485350221377308028,7269523179423750332937,

%U 42286820404292801713317670,489171492515135237008883532896

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 18 2008