A208042 - OEIS

%I #5 Mar 31 2012 12:37:21

%S 19,361,1995,11025,94605,811801,5866411,42393121,327288437,2526771289,

%T 19008214715,142993641025,1086798939915,8260031196729,62521114891599,

%U 473229424222569,3587920094200239,27202811032966009,206103852899096453

%N Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 0 1 vertically

%C Row 6 of A208039

%H R. H. Hardin, <a href="/A208042/b208042.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 22 2012