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%I #6 Mar 31 2012 12:37:32
%S 35,5558,6028871,44678808183,2261599192647037,781910030615896210474,
%T 1846356382998737252290206762,29777644269614247388351983235258241,
%U 3280051134759806457403130482690269897360711
%N Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences
%C Diagonal of A210276
%H R. H. Hardin, <a href="/A210268/b210268.txt">Table of n, a(n) for n = 1..11</a>
%e Some solutions for n=4
%e ..0..2..2..0..0....2..2..1..2..2....2..1..0..2..1....0..0..0..1..2
%e ..0..1..0..2..1....2..1..2..1..1....2..1..2..2..1....1..0..2..1..0
%e ..1..1..2..0..0....1..2..1..1..2....2..0..2..0..0....2..2..2..0..0
%e ..2..0..1..1..0....1..1..0..1..2....0..0..2..1..2....2..0..1..0..1
%e ..1..1..1..2..1....1..2..0..1..2....0..1..2..0..2....1..0..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 19 2012
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