A207581 - OEIS

%I #4 Mar 31 2012 12:37:18

%S 12747,162486009,1495251731248,13535979641561061,

%T 122196720716205612586,1102841040771965457584054

%N Number of nX7 0..3 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically

%C Column 7 of A207582

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 19 2012