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Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any vertical neighbor equal to 4-1.
1

%I #6 Aug 12 2016 06:53:59

%S 8,384,22016,1584088,124214208,10318543104,891453176832,

%T 79282110189528,7210026166925504,667397938420086784,

%U 62673274464982136832,5956095271996318830016,571751372700932605781504

%N Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any vertical neighbor equal to 4-1.

%C Row 4 of A265863.

%H R. H. Hardin, <a href="/A265865/b265865.txt">Table of n, a(n) for n = 1..39</a>

%e Some solutions for n=3

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

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

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

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

%Y Cf. A265863.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 17 2015