%I
%S 0,21,67,2059,41755,986376,22238670,514990479,11843513563,
%T 273193577866,6295815062637,145178091690740,3347707869286493,
%U 77204310077778551,1780484848971706031,41062118413701907548,946988189894419322573
%N Half the number of nX9 binary arrays with each element equal to at least two neighbors
%C Column 9 of A180760
%H R. H. Hardin, <a href="/A180758/b180758.txt">Table of n, a(n) for n=1..99</a>
%K nonn
%O 1,2
%A _R. H. Hardin_ Sep 20 2010
