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%I #5 Mar 31 2012 12:37:33
%S 40,13566,38415623,934012605398,193382034306882852,
%T 341167083547574037214431,5125371159957295208758939227336,
%U 655672443742537489846231752745295823823
%N 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences
%C Diagonal of A210355
%e Some solutions for n=4
%e ..2..2..1..0..3....0..0..1..1..1....2..0..1..2..1....0..1..0..2..2
%e ..2..2..0..0..3....3..3..2..2..0....0..0..1..3..2....1..0..0..1..0
%e ..3..1..1..2..1....0..3..1..1..3....2..0..2..2..1....1..0..0..0..1
%e ..2..1..1..1..1....1..2..1..1..1....1..0..1..1..2....2..0..3..3..2
%e ..3..3..3..1..3....2..3..2..1..1....2..1..0..0..3....1..0..3..2..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 20 2012
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