A188274 Number of nondecreasing strings of numbers x(i=1..n) in -6..6 with sum x(i)^3 equal to 0.

1, 7, 7, 30, 30, 106, 114, 346, 422, 1070, 1482, 3166, 4778, 8954, 14026, 23987, 37639, 60443, 93145, 143096, 214982, 319514, 467648, 676718, 966748, 1367076, 1911186, 2647754, 3631406, 4939378, 6659970, 8910883, 11832157, 15599235, 20427293

Offset

1,2

Comments

Column 6 of A188277.

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

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

Crossrefs

Cf. A188277.

Sequence in context: A341246 A246039 A186142 * A255281 A255283 A140252

Adjacent sequences: A188271 A188272 A188273 * A188275 A188276 A188277

Keyword

nonn

Author

R. H. Hardin, Mar 26 2011

Status

approved