A207197 - OEIS

%I #5 Mar 31 2012 12:37:15

%S 69,4761,247002,12539372,632716336,31901664357,1610194874799,

%T 81287871720373,4104318500772121,207237297025296600,

%U 10464020397550910416,528359580441380112910,26678441328805428234587,1347073335296997275306445

%N Number of nX4 0..2 arrays avoiding the pattern z-1 z-1 z in any row or column

%C Column 4 of A207201

%H R. H. Hardin, <a href="/A207197/b207197.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 15 2012