A184682 - OEIS

%I #5 Mar 31 2012 12:36:01

%S 568,10384,140816,2171152,31817360,476660624,7079094288,105530924944,

%T 1570852959248,23397537190544,348412932162320,5188788920597392,

%U 77271414617633808,1150747018045489296,17137111768900018448

%N Number of (n+1)X6 binary arrays with every 2X2 subblock singular

%C Column 5 of A184686

%H R. H. Hardin, <a href="/A184682/b184682.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n)=25*a(n-1)-131*a(n-2)-771*a(n-3)+8180*a(n-4)-11482*a(n-5)-71100*a(n-6)+202352*a(n-7)+125888*a(n-8)-816032*a(n-9)+304768*a(n-10)+951040*a(n-11)-590848*a(n-12)-217088*a(n-13)+98304*a(n-14)

%e Some solutions for 3X6

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 19 2011