A239401 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of elements above it, modulo 4.

16, 478, 13977, 394509, 11334364, 326882784, 9402398952, 270516990628, 7789048968124, 224284362847360, 6457977012007180, 185957590016422087, 5354807669541831222, 154196812648221842975, 4440254588265618959278

Offset: 1

Author

R. H. Hardin, Mar 17 2014

Keywords

• nonn

Comments

Column 4 of A239405

Examples

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

Links

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