%I #5 Mar 31 2012 12:35:54
%S 328,1766,9557,54724,310856,1846987,10793131,65461226,388802189,
%T 2384144524,14297712925,88196069895,532232190325,3294387009947,
%U 19971273401620,123891049069844,753824181622246,4683860177500797
%N Number of (n+1)X4 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others
%C Column 3 of A183854
%H R. H. Hardin, <a href="/A183848/b183848.txt">Table of n, a(n) for n = 1..200</a>
%F Empirical: a(n)=8*a(n-1)+59*a(n-2)-565*a(n-3)-822*a(n-4)+13359*a(n-5)-4545*a(n-6)-132397*a(n-7)+154942*a(n-8)+558160*a(n-9)-920421*a(n-10)-1048403*a(n-11)+2303548*a(n-12)+729071*a(n-13)-2730029*a(n-14)+118317*a(n-15)+1498861*a(n-16)-308470*a(n-17)-342440*a(n-18)+95112*a(n-19)+25872*a(n-20)-8064*a(n-21)
%e Some solutions for 3X4
%e ..3..1..1..3....2..0..2..2....1..3..1..3....2..2..0..2....1..2..1..3
%e ..2..3..2..1....2..2..2..0....1..2..1..2....0..2..0..2....3..3..3..2
%e ..3..1..3..3....0..0..2..0....3..3..3..3....2..2..2..2....1..2..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 07 2011