A200202 Number of -6..6 arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences.

1316, 14842, 168054, 1910006, 21939870, 253625670, 2949336370, 34451583494, 403936559664, 4751104584700, 56034400780878, 662427465209118, 7847270531133920, 93130188698344434, 1107048144990218486

Offset

1,1

Comments

Column 6 of A200204.

Links

R. H. Hardin, Table of n, a(n) for n = 1..42

Example

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

Crossrefs

Cf. A200204.

Sequence in context: A242151 A260765 A241962 * A255799 A023318 A066663

Adjacent sequences: A200199 A200200 A200201 * A200203 A200204 A200205

Keyword

nonn

Author

R. H. Hardin, Nov 14 2011

Status

approved