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.

24, 729, 18728, 510748, 13597573, 366379173, 9807771898, 263419973152, 7064275271994, 189566431524540, 5085635223031781, 136450277248685119, 3660861731265982119, 98220442090411319757, 2635213560025173917109

Offset: 1

Author

R. H. Hardin, Mar 27 2014

Keywords

• nonn

Comments

Column 4 of A239819

Examples

			Some solutions for n=3
..3..0..2..2....3..2..3..2....3..2..3..2....3..2..2..0....3..2..3..2
..3..0..2..0....2..1..1..2....3..1..2..1....2..1..0..0....1..0..2..1
..1..0..0..2....1..3..3..2....2..1..1..1....3..2..0..2....3..0..0..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210