A240152 Number of nX6 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

15, 57, 450, 5701, 88214, 1608415, 30542203, 584983851, 11643589675, 228028231216

Offset: 1

Author

R. H. Hardin, Apr 02 2014

Keywords

• nonn

Comments

Column 6 of A240153

Examples

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