A200267 Number of 0..3 arrays x(0..n+1) of n+2 elements with zero n-1st differences.

1, 4, 4, 6, 8, 8, 8, 16, 4, 10, 12, 36, 20, 48, 8, 20, 28, 70, 28, 154, 8, 32, 40, 174, 16, 100, 4, 38, 44, 118

Offset: 1

Author

R. H. Hardin Nov 15 2011

Keywords

• nonn

Comments

Column 3 of A200272

Examples

			All solutions for n=6
..1....2....2....1....1....3....2....0
..0....3....1....1....2....3....2....0
..1....2....2....1....1....3....2....0
..2....1....3....1....0....3....2....0
..2....1....3....1....0....3....2....0
..1....2....2....1....1....3....2....0
..0....3....1....1....2....3....2....0
..1....2....2....1....1....3....2....0