A200164 Number of -7..7 arrays x(0..n-1) of n elements with nonzero sum and with zero through n-1 differences all nonzero

14, 168, 2180, 27160, 336992, 4141212, 50917674, 624074768

Offset

1,1

Comments

Column 7 of A200165

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=5
.-3....4....1...-7...-3...-3...-3....1....1....1...-7....5...-7...-7...-4...-7
..2...-6...-7....6...-6...-4...-7...-1...-4....7....3....4....7...-5....4...-3
.-3...-2...-5...-3...-5....2....1...-7....3....4...-2...-3...-7....2...-7...-1
..6...-7....1...-1...-3...-4....3....6....2...-1....2....4...-4...-7...-1....6
..2...-1...-1...-7....4....7....4...-1...-6...-3...-7...-6....6...-6...-3...-7

Crossrefs

Sequence in context: A125449 A159738 A062148 * A199529 A098299 A341500

Adjacent sequences: A200161 A200162 A200163 * A200165 A200166 A200167

Keyword

nonn

Author

R. H. Hardin Nov 13 2011

Status

approved