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%I #5 Mar 31 2012 12:35:54
%S 1664363,2795479074,4667280876143,7801858146547239,
%T 13038188765075658693,21790300291942204212420,
%U 36416871665698098357399165,60861648410395945188375656659,101714848253512230696174483833179
%N 1/4 the number of (n+1)X6 0..3 arrays with no 2X2 subblock having sum 6
%C Column 5 of A183802
%H R. H. Hardin, <a href="/A183798/b183798.txt">Table of n, a(n) for n = 1..21</a>
%e Some solutions for 3X6
%e ..0..0..0..0..0..0....0..0..2..0..0..0....0..0..0..0..0..0....0..0..2..0..0..0
%e ..2..2..0..0..0..0....3..0..0..0..0..0....3..2..2..2..0..0....0..0..0..0..0..0
%e ..2..2..3..0..2..0....1..1..0..0..1..0....0..0..3..2..1..3....2..3..2..2..2..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 07 2011
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