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Number of nX6 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal
1

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

%S 3636,13220496,35974254384,100388008195387,277547203982336971,

%T 768965608329861602588,2129766555218823044199240,

%U 5899351779197139995930378687,16340661622490256210423617956636

%N Number of nX6 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal

%C Column 6 of A206900

%H R. H. Hardin, <a href="/A206898/b206898.txt">Table of n, a(n) for n = 1..54</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 13 2012