A199941 Number of -6..6 arrays x(0..n-1) of n elements with zeroth through n-1st differences all nonzero

12, 132, 1404, 14696, 152586, 1577040, 16261206, 167447004, 1723164176, 17727091612

Offset

1,1

Comments

Column 6 of A199943

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A165150 A378503 A002921 * A001336 A118475 A190873

Adjacent sequences: A199938 A199939 A199940 * A199942 A199943 A199944

Keyword

nonn

Author

R. H. Hardin Nov 12 2011

Status

approved