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Number of (n+1)X8 0..3 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order
1

%I #5 Mar 31 2012 12:36:58

%S 3188647,4631370535,6726865579687,9803443695486967,

%T 14294949784964335495,20848169781599252276647,

%U 30407052005824642303153447,44349315527117554056938865367,64684656141868016921281663326727

%N Number of (n+1)X8 0..3 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order

%C Column 7 of A203878

%H R. H. Hardin, <a href="/A203877/b203877.txt">Table of n, a(n) for n = 1..21</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2012