A200160 Number of -3..3 arrays x(0..n-1) of n elements with nonzero sum and with zero through n-1 differences all nonzero.

6, 24, 128, 576, 2778, 12440, 57992, 262444, 1202540, 5463896, 24922570, 113239064, 515471532, 2342330752, 10649798938

Offset: 1

Author

R. H. Hardin Nov 13 2011

Keywords

• nonn

Comments

Column 3 of A200165

Examples

			Some solutions for n=5
.-1...-1....2....2....2....1...-3....3....3...-3...-1....3....1...-1...-1....3
..2....1...-2...-1....3....3....2...-2...-2....3...-2...-2...-3...-3....2....1
.-3...-2...-1....2....1....2...-3...-1...-1....1....1....2....1....1...-1....3
..1...-1....1....3...-2...-3...-1....1....1...-3...-2....3...-2...-1...-2...-1
.-2...-2...-2...-1....1....1...-2...-2...-3...-1....3....2...-1....2....3....1