A226396 Number of nondecreasing -5..5 vectors of length n whose dot product with some nonincreasing -5..5 vector equals n

2, 48, 224, 912, 2674, 6900, 15614, 37804, 74606, 163304, 286196, 557084, 887602, 1518950, 2861206, 4438472

Offset

1,1

Comments

Column 5 of A226398

Links

Table of n, a(n) for n=1..16.

Example

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

Crossrefs

Sequence in context: A326778 A083251 A226401 * A341110 A075690 A101362

Adjacent sequences: A226393 A226394 A226395 * A226397 A226398 A226399

Keyword

nonn

Author

R. H. Hardin Jun 06 2013

Status

approved