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A239815 Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it, modulo 4.

%I A239815 #6 Jun 02 2025 09:32:00
%S A239815 24,729,18728,510748,13597573,366379173,9807771898,263419973152,
%T A239815 7064275271994,189566431524540,5085635223031781,136450277248685119,
%U A239815 3660861731265982119,98220442090411319757,2635213560025173917109
%N A239815 Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it, modulo 4.
%C A239815 Column 4 of A239819
%H A239815 R. H. Hardin, <a href="/A239815/b239815.txt">Table of n, a(n) for n = 1..210</a>
%e A239815 Some solutions for n=3
%e A239815 ..3..0..2..2....3..2..3..2....3..2..3..2....3..2..2..0....3..2..3..2
%e A239815 ..3..0..2..0....2..1..1..2....3..1..2..1....2..1..0..0....1..0..2..1
%e A239815 ..1..0..0..2....1..3..3..2....2..1..1..1....3..2..0..2....3..0..0..2
%K A239815 nonn
%O A239815 1,1
%A A239815 _R. H. Hardin_, Mar 27 2014