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Number of nX7 0..2 arrays with new values 0..2 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors)
1

%I #5 Mar 31 2012 12:37:23

%S 365,13824,15273,169899,2623167,36422648,509698666,7308976236,

%T 104548902187,1491128667703,21311956695888,304671374144232,

%U 4354902558505404,62240469327888568,889738186413603234

%N Number of nX7 0..2 arrays with new values 0..2 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors)

%C Column 7 of A208434

%H R. H. Hardin, <a href="/A208433/b208433.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 26 2012