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%I #6 Dec 15 2013 06:19:28
%S 2104,21432,233432,2723072,32240288,389230764,4696134192,57174669348,
%T 693181060760,8455863542400,102666251086924,1252787231370072,
%U 15219081421614496,185695021438104644,2256549296014445884
%N Number of (n+1)X(4+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal
%C Column 4 of A233733
%H R. H. Hardin, <a href="/A233729/b233729.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A233729/a233729.txt">Empirical recurrence of order 84</a>
%F Empirical recurrence of order 84 (see link above)
%e Some solutions for n=2
%e ..0..1..3..1..2....2..0..2..0..2....2..0..1..2..0....2..0..3..1..3
%e ..2..3..2..0..3....3..2..1..2..1....3..2..0..3..2....0..1..2..0..2
%e ..0..1..0..1..2....2..0..2..0..2....1..3..1..2..0....2..0..3..2..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 15 2013
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