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Number of nX7 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors)
1

%I #4 Mar 31 2012 12:37:22

%S 715,629860,23658861,2280287753,340596199800,52428246114853

%N Number of nX7 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors)

%C Column 7 of A208353

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 25 2012