A207204 - OEIS

%I #5 Mar 31 2012 12:37:16

%S 69,4761,192640,7766709,309262926,12412097426,500670359576,

%T 20211739475415,816401994553473,32972023758335404,1331635905868048301,

%U 53778704755332004072,2171870069814018679084,87711499374615432079880

%N Number of nX4 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

%C Column 4 of A207208

%H R. H. Hardin, <a href="/A207204/b207204.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 15 2012