A184781 - OEIS

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

%S 260268,13313404,681288932,34797264276,1778231844136,90873049503556,

%T 4643641622051596,237295567539569352,12126082907249375676,

%U 619655984740726276728,31665112274179396900624,1618122571180552272792264

%N Number of (n+2)X4 0..2 arrays with each 3X3 subblock nonsingular

%C Column 2 of A184784

%H R. H. Hardin, <a href="/A184781/b184781.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 6X4

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

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

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

%e ..0..1..0..2....2..1..0..0....0..2..0..1....1..1..2..0....0..1..2..1

%e ..1..2..0..1....1..2..2..1....1..0..0..2....2..0..0..2....2..2..0..1

%e ..0..1..2..0....0..1..2..0....1..1..2..2....0..2..2..0....1..2..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 21 2011