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%I #5 Mar 31 2012 12:35:55
%S 9650,136894,1846987,31362526,515409762,9808052813,181527680767,
%T 3637653147102,71400670236377,1460353019415072,29473951514959991,
%U 607704516654872749,12431600718178381761,257173291746012588265
%N Number of (n+1)X7 0..3 arrays with each element of every 2X2 subblock being the sum mod 4 of two others
%C Column 6 of A183854
%H R. H. Hardin, <a href="/A183851/b183851.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for 3X7
%e ..2..2..2..0..0..0..2....1..3..2..3..3..3..3....2..3..1..1..1..3..2
%e ..0..0..0..2..2..2..0....2..1..1..1..2..1..2....1..1..2..3..2..1..1
%e ..2..2..2..0..0..0..2....3..3..2..3..1..3..1....2..3..3..1..1..3..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 07 2011