The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #4 Mar 23 2014 07:08:46
%S 258,75540,21813374,6219477628,1778793691226,506611939408296,
%T 144633234041629586,41228312635698988592,11764207025789049116296,
%U 3354764803854586870996290,957059647333850993834828574
%N Number of 7Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4
%C Row 7 of A239649
%H R. H. Hardin, <a href="/A239655/b239655.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..3..0....3..0....3..0....3..1....1..3....3..1....3..1....3..0....1..3....1..0
%e ..3..1....3..0....3..0....3..1....1..0....2..1....3..1....3..1....1..3....2..0
%e ..2..1....2..1....2..0....3..2....3..2....2..1....2..1....1..2....3..1....2..3
%e ..1..2....1..0....1..0....1..3....1..0....3..2....1..2....3..2....1..3....2..3
%e ..1..0....1..2....1..0....2..3....3..1....2..0....1..0....2..0....1..3....3..2
%e ..2..0....2..3....3..1....3..2....1..2....1..2....3..1....1..2....3..1....3..1
%e ..1..0....3..2....2..1....3..0....2..0....1..3....2..1....2..3....3..2....1..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 23 2014