A200203 Number of -7..7 arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences

2064, 26932, 352840, 4664818, 62361448, 838749476, 11349503058, 154248783948, 2104280597600, 28798650135574, 395207143815892, 5436349736878032, 74936087200093134, 1034832015199700638, 14313834216014729042

Offset

1,1

Comments

Column 7 of A200204

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

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

Crossrefs

Sequence in context: A106719 A119722 A234110 * A204314 A204310 A168432

Adjacent sequences: A200200 A200201 A200202 * A200204 A200205 A200206

Keyword

nonn

Author

R. H. Hardin Nov 14 2011

Status

approved