A240326 Number of nX6 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

14, 213, 8091, 189549, 3898804, 113751796, 2343565571, 58754628922, 1550370290554, 33299137997969, 861337519232031, 21016117833481545, 474930037525217349, 12220742975175544998, 287468219917419510614

Offset: 1

Author

R. H. Hardin, Apr 03 2014

Keywords

• nonn

Comments

Column 6 of A240327

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..18