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%I #4 Nov 03 2013 07:20:13
%S 0,70,16198,209440,7293728,448752816,22665736960,1062745551964,
%T 51169742197940,2490580691600010,120768122138064308,
%U 5846745297848730442,283216346242793114828,13722274843334336410906,664810299194759446763984
%N Number of 6Xn 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero
%C Row 6 of A231049
%H R. H. Hardin, <a href="/A231054/b231054.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..1..0..3....0..1..0..3....0..1..2..3....0..1..2..1....0..1..0..3
%e ..0..3..2..3....0..3..2..1....0..3..0..1....0..3..0..3....2..3..2..3
%e ..0..1..2..3....0..3..0..1....0..1..0..3....2..3..0..3....0..1..0..1
%e ..2..3..0..1....2..1..2..1....2..3..2..3....2..1..2..1....2..1..2..3
%e ..2..3..0..1....2..1..0..3....2..1..2..1....2..3..2..1....0..3..2..1
%e ..0..1..2..3....0..3..2..1....0..3..0..3....0..1..0..1....0..1..0..3
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 03 2013
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