A238653 - OEIS

%I #4 Mar 02 2014 09:17:31

%S 21,882,7473,112827,1349732,17672899,223336353,2861990416,36475373351,

%T 465876675157,5945303162296,75896550206911,968753829090555,

%U 12365941291118010,157845481105247677,2014840165844453827

%N Number of (n+2)X(7+2) 0..1 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..1 introduced in row major order

%C Column 7 of A238654

%H R. H. Hardin, <a href="/A238653/b238653.txt">Table of n, a(n) for n = 1..195</a>

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 02 2014