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%I #5 Mar 31 2012 12:37:29
%S 6049,490547,35741496,2708892873,203828058161,15380031974285,
%T 1159953545419801,87501032165288030,6600426667881339226,
%U 497894721865502792367,37557974910650911070499,2833135360759134027255304
%N 1/4 the number of (n+1)X8 0..3 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences
%C Column 7 of A209553
%H R. H. Hardin, <a href="/A209552/b209552.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..1..2..3..0..1..0..3..2....0..1..0..3..0..1..2..3....1..0..3..0..1..2..3..2
%e ..0..3..2..1..0..1..2..1....1..0..1..2..1..2..3..2....0..1..2..1..0..3..2..1
%e ..3..0..1..2..1..0..1..0....2..1..0..3..0..3..2..1....3..2..3..0..1..2..3..2
%e ..2..1..2..3..0..1..0..1....3..0..1..2..1..2..1..2....0..1..2..1..0..1..0..1
%e ..1..0..3..2..1..0..1..0....2..1..0..1..2..3..2..1....3..2..3..0..1..0..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 10 2012
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