A199948 Number of -n..n arrays x(0..6) of 7 elements with zeroth through 6th differences all nonzero

2, 2490, 63260, 672866, 3879760, 16261206, 52799912, 146068736, 354811296, 782544732, 1588743870, 3033145320, 5471502126, 9441265238, 15658407444, 25110211642

Offset

1,1

Comments

Row 7 of A199943

Links

Table of n, a(n) for n=1..16.

Example

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

Crossrefs

Sequence in context: A135234 A274962 A375077 * A261382 A281692 A225221

Adjacent sequences: A199945 A199946 A199947 * A199949 A199950 A199951

Keyword

nonn

Author

R. H. Hardin Nov 12 2011

Status

approved