A200077 Number of 0..3 arrays x(0..n) of n+1 elements with zero n-1st differences.

1, 4, 6, 8, 14, 18, 24, 56, 26, 26, 54, 226, 260, 482, 196, 54, 128, 728, 1226, 4106, 1168, 272, 892, 4798, 1390, 1298, 962, 216, 470, 2104

Offset: 1

Author

R. H. Hardin Nov 13 2011

Keywords

• nonn

Comments

Column 3 of A200082

Examples

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