A226421 Number of nondecreasing -7..7 vectors of length n whose dot product with some lexicographically greater or equal nondecreasing -7..7 vector equals n

2, 62, 431, 2394, 9546, 35451, 108478, 302135, 777184, 1900407, 4327920, 9528141, 19739530

Offset

1,1

Comments

Column 7 of A226422

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A239417 A296361 A224844 * A091817 A239786 A209183

Adjacent sequences: A226418 A226419 A226420 * A226422 A226423 A226424

Keyword

nonn

Author

R. H. Hardin Jun 06 2013

Status

approved