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%I #4 Mar 17 2014 17:51:07
%S 156,20818,2590704,326882784,40566958960,5072216819342,
%T 630657074443394,78666433617260802,9791612259389470778,
%U 1220385596630190836830,151973853622892194440357,18935435888110044394225594
%N Number of 6Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4
%C Row 6 of A239405
%H R. H. Hardin, <a href="/A239410/b239410.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..3..1....0..0....0..0....0..3....3..3....0..3....3..3....3..1....0..3....3..1
%e ..2..0....0..0....3..1....0..2....0..2....3..2....0..3....0..2....0..3....2..0
%e ..0..0....3..1....3..2....3..2....3..1....0..2....2..2....2..2....3..2....2..2
%e ..2..2....3..1....2..2....0..2....3..1....0..0....0..3....0..2....0..3....3..3
%e ..2..2....3..2....0..0....0..2....2..2....0..3....2..2....0..2....3..3....2..2
%e ..0..0....2..1....0..2....3..3....0..0....3..2....3..1....2..1....3..3....3..3
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 17 2014