A206896 - OEIS

%I #5 Mar 31 2012 12:37:14

%S 241,58081,11745962,2408811358,491471001691,100388008195387,

%T 20501676381643219,4187168666551506836,855161142688231935007,

%U 174653143197806276287106,35670128759740127202030518

%N Number of nX4 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal

%C Column 4 of A206900

%H R. H. Hardin, <a href="/A206896/b206896.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..1..0..2..1....1..3..2..1....3..2..2..1....1..0..3..2....3..1..1..2

%e ..0..1..0..2....1..1..0..3....1..2..2..0....1..1..0..0....0..1..0..0

%e ..2..1..0..0....2..3..3..0....1..3..1..3....3..1..3..0....0..0..3..0

%e ..1..0..1..0....0..2..1..3....1..0..3..3....1..0..1..3....1..1..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 13 2012