A207912 - OEIS

%I #5 Mar 31 2012 12:37:20

%S 25,625,2625,11025,110775,1113025,6835345,41977441,336253621,

%T 2693506201,18577402747,128130350209,960194962333,7195597016521,

%U 51458156348129,367994740209721,2701833829557059,19836984730756561,143485534654475891

%N Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically

%C Row 7 of A207908

%H R. H. Hardin, <a href="/A207912/b207912.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 21 2012