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%I #5 Mar 31 2012 12:37:30
%S 2902980,2819342124,2710658447034,2613436161921981,
%T 2518750352620857312,2427793108137633168210,2340066952652845862645106,
%U 2255530912287027117930612162,2174043398490162505254364682718
%N Half the number of (n+1)X8 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference
%C Column 7 of A209796
%H R. H. Hardin, <a href="/A209795/b209795.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..1..1..1..0..1..0..1....0..2..0..2..1..0..1..2....0..2..2..0..0..1..0..1
%e ..1..1..0..2..2..1..1..1....0..2..1..1..1..2..2..2....1..2..0..0..1..1..2..2
%e ..0..2..2..2..0..0..0..1....0..2..0..2..0..0..0..1....1..2..1..1..1..2..2..1
%e ..0..0..1..0..0..1..1..1....2..2..0..2..2..0..1..1....1..1..1..0..1..2..1..1
%e ..2..0..1..0..2..1..2..1....0..2..2..2..0..0..2..1....0..1..2..2..2..2..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 13 2012
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