A200210 Number of -n..n arrays x(0..8) of 9 elements with zero sum and nonzero second and third differences

360, 63326, 1282168, 11315108, 62141592, 253625670, 838749476, 2371034404, 5950389676, 13585723472, 28694253866, 56870615234, 106810248534, 191533300498, 330111908464, 549616167606, 887398698638, 1394638491438

Offset

1,1

Comments

Row 6 of A200204

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

Some solutions for n=3
.-3...-2...-2...-3...-3...-1...-2...-3...-2...-2...-2...-2...-3...-3...-3...-3
.-3...-3...-3....0....1...-3...-3...-3...-3...-3...-3...-3....1....0....1....0
..3....0....3...-2...-2....1....3....2....1...-1....0....2...-2...-2...-2....0
..0....1....0....3...-1....2...-1....2....0....3....0....0....1....0....0....3
..3...-2...-1....0....3....1....1....3....2...-1...-1....3....3....3....3....0
..2....1....3....2...-3...-3....2....1....3....1....2...-1....1....1....2....3
.-2....1...-3....1....2....2...-2....1...-3...-1....2...-3....3...-2....0...-2
.-1....3....2...-2....0....2...-1....0....1....3....0....2...-2....0...-1....1
..1....1....1....1....3...-1....3...-3....1....1....2....2...-2....3....0...-2

Crossrefs

Sequence in context: A299955 A166785 A265455 * A263509 A317796 A145412

Adjacent sequences: A200207 A200208 A200209 * A200211 A200212 A200213

Keyword

nonn

Author

R. H. Hardin Nov 14 2011

Status

approved