A208835 - OEIS

%I #7 Dec 18 2015 18:18:04

%S 2,16,78,855,8736,272206,6206445,613538688,30091441770,9949962265465,

%T 995860712362464,1146808937112275178,223896318271083352427,

%U 927305041435819383020944,341298409330345173624970966

%N Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically

%C Diagonal of A208840

%H R. H. Hardin, <a href="/A208835/b208835.txt">Table of n, a(n) for n = 1..37</a>

%e Some solutions for n=4

%e ..1..1..1..1....0..1..0..1....1..0..1..0....0..1..1..0....1..0..1..1

%e ..0..1..0..1....1..0..1..0....1..1..0..0....0..1..1..1....0..1..1..0

%e ..1..1..1..1....0..1..0..1....1..0..1..0....1..1..1..0....1..0..1..1

%e ..0..1..0..1....1..0..1..0....1..1..0..1....0..1..1..1....0..1..1..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 01 2012