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%I #4 Nov 01 2013 07:07:58
%S 0,272,2676,23614,219696,2121666,20713786,202875672,1989694528,
%T 19528076278,191729518620,1882751038230,18489720853716,
%U 181586260234680,1783375832120916,17514856242872756,172017407770200164
%N Number of nX6 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero
%C Column 6 of A230910
%H R. H. Hardin, <a href="/A230908/b230908.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..3..1..0..2..1....0..1..2..3..1..2....0..2..3..1..0..3....0..2..0..1..3..0
%e ..1..0..2..3..0..2....3..0..1..0..3..1....1..0..2..3..2..1....1..3..2..0..1..2
%e ..2..3..0..2..1..3....1..2..3..1..2..0....3..1..0..1..3..2....0..1..3..2..0..3
%e ..1..2..1..3..0..2....0..1..2..0..3..2....0..2..3..2..0..1....3..0..1..3..1..2
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 01 2013
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