A226420 Number of nondecreasing -6..6 vectors of length n whose dot product with some lexicographically greater or equal nondecreasing -6..6 vector equals n

2, 47, 275, 1415, 4932, 17203, 44256, 118669, 275619, 628149, 1305850, 2677789, 5057899, 9510519, 17126490, 30158971, 51409213, 86308875

Offset

1,1

Comments

Column 6 of A226422

Links

Table of n, a(n) for n=1..18.

Example

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

Crossrefs

Sequence in context: A355009 A304725 A128822 * A160922 A276509 A120050

Adjacent sequences: A226417 A226418 A226419 * A226421 A226422 A226423

Keyword

nonn

Author

R. H. Hardin Jun 06 2013

Status

approved