A201442 Number of zero-sum -n..n arrays of 7 elements with first through fourth differences also in -n..n

5, 39, 295, 1275, 4285, 11591, 27087, 57287, 111197, 203089, 349901, 576085, 913583, 1401163, 2091765, 3041933, 4328151, 6039055, 8278625, 11178429, 14870953, 19532181, 25349001, 32546367, 41378489, 52112595, 65077017, 80620049, 99147253

Offset

1,1

Comments

Row 7 of A201439

Links

R. H. Hardin, Table of n, a(n) for n = 1..50

Example

Some solutions for n=8
.-4....1....2...-7....1....5...-6...-4....0....4...-1....4...-2....4....5...-1
..1...-1...-1...-6....4....2...-3...-4...-4....1...-5...-1....3...-1....3...-3
..1...-3...-2...-1....4...-1...-3...-1....0....0...-4...-5....6...-3....2...-3
..0...-3...-2....2...-1...-3...-3....1....5...-2...-2...-4....3...-1....1...-2
..0...-3....0....3...-5...-4....1....0....5...-4....1...-2...-3....1...-1....0
..0....1....2....4...-4...-1....7....2....1...-2....5....2...-6....0...-3....4
..2....8....1....5....1....2....7....6...-7....3....6....6...-1....0...-7....5

Crossrefs

Sequence in context: A053573 A003482 A221357 * A135849 A105426 A356622

Adjacent sequences: A201439 A201440 A201441 * A201443 A201444 A201445

Keyword

nonn

Author

R. H. Hardin Dec 01 2011

Status

approved