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Number of 6Xn 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order
1

%I #5 Aug 11 2014 22:45:56

%S 528,25211,2920145,304926626,33113065637,3584186808548,

%T 388985760511817,42219381207630485,4583504040235930607,

%U 497623532490414737372,54027709864321432349219,5865910777448530290474011

%N Number of 6Xn 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order

%C Row 6 of A233098

%H R. H. Hardin, <a href="/A233103/b233103.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A233103/a233103.txt">Empirical recurrence of order 87</a>

%F Empirical recurrence of order 87 (see link above)

%e Some solutions for n=2

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 04 2013