%I
%S 1,10,67,1859,144973,23675451,10663538347,12275556405619,
%T 35393545223418744,261328488528715635157,4921805399637541783782081,
%U 235643299844227266763714703387
%N Number of n X n binary arrays with every 1 adjacent to at least one other 1, but at most one 1 adjacent horizontally and at most one 1 adjacent vertically.
%K nonn
%O 1,2
%A _R. H. Hardin_, Sep 08 2008
