A180757 - OEIS

%I #3 Mar 31 2012 12:35:46

%S 0,13,31,658,8840,141313,2141384,33329847,514990479,7988200496,

%T 123822198215,1920693558801,29793765165720,462205529321051,

%U 7170401050696078,111238701384104135,1725707750909016718

%N Half the number of nX8 binary arrays with each element equal to at least two neighbors

%C Column 8 of A180760

%H R. H. Hardin, <a href="/A180757/b180757.txt">Table of n, a(n) for n=1..99</a>

%K nonn

%O 1,2

%A _R. H. Hardin_ Sep 20 2010