A200043 Number of -n..n arrays x(0..6) of 7 elements with sum zero and with zeroth through 6th differences all nonzero

0, 214, 5268, 41228, 192280, 674234, 1882238, 4559584, 9869410, 19627458, 36265862, 63537830, 105895974, 169797756, 263132194, 395819648, 579860740, 831059432, 1166406254, 1608524888

Offset

1,2

Comments

Row 7 of A200038

Links

Table of n, a(n) for n=1..20.

Example

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

Crossrefs

Sequence in context: A258961 A204486 A221807 * A184600 A278093 A259015

Adjacent sequences: A200040 A200041 A200042 * A200044 A200045 A200046

Keyword

nonn

Author

R. H. Hardin Nov 12 2011

Status

approved