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%I #5 Mar 31 2012 12:37:30
%S 63280,9278940,1293734407,183988612894,26024000948100,
%T 3690894707522275,522757733883587522,74095286689410395475,
%U 10497954243766841570370,1487704397822521872822441,210801722411081467285442780
%N 1/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences
%C Column 5 of A209716
%H R. H. Hardin, <a href="/A209713/b209713.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..1..0..0..0..0..3....1..0..0..1..1..1....1..0..0..1..0..2....0..3..1..3..0..1
%e ..1..3..1..3..1..3....1..3..2..3..0..3....3..2..3..1..3..3....0..1..0..2..3..1
%e ..1..0..3..2..3..0....3..0..0..3..1..3....3..0..1..0..0..1....3..3..2..3..0..3
%e ..0..2..0..0..1..0....2..2..3..1..0..1....2..3..1..3..2..0....0..1..0..3..1..1
%e ..0..3..1..3..3..0....3..0..1..0..3..0....2..0..0..0..3..0....3..3..2..2..3..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 11 2012
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