%I

%S 0,3,63,4475,1154119,1064583557,3538520414645,42325704140613463,

%T 1822180205677117048273,282344956970612464702333909,

%U 157459613671260527898784781898227

%N Half the number of n X n binary arrays with each element equal to at least one neighbor

%C Diagonal of A180771

%K nonn

%O 1,2

%A _R. H. Hardin_ Sep 20 2010