A207447 - OEIS

%I #5 Mar 31 2012 12:37:17

%S 35,1225,14743,165626,2078416,24609889,284247216,3316383098,

%T 38630942068,448234580146,5204017590681,60440346257235,

%U 701591767463860,8143643192312255,94537663920104487,1097406693263337001

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

%C Row 7 of A207442

%H R. H. Hardin, <a href="/A207447/b207447.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 17 2012