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

1,1

Comments

Column 3 of A200165

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A188232 A274072 A224662 * A219622 A052170 A027224

Adjacent sequences: A200157 A200158 A200159 * A200161 A200162 A200163

Keyword

nonn

Author

R. H. Hardin Nov 13 2011

Status

approved