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Number of nX7 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal
0

%I #4 Mar 31 2012 12:37:17

%S 10686,114190596,415949940602,1897778216001770,8467264566580418754,

%T 37628798991659309387420

%N Number of nX7 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal

%C Column 7 of A207479

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 18 2012