A226428 Number of nondecreasing -n..n vectors of length 7 whose dot product with some lexicographically greater or equal nondecreasing -n..n vector equals 7

8, 254, 1488, 5573, 17441, 44256, 108478, 224471, 443879, 815019, 1452101, 2431380

Offset

1,1

Comments

Row 7 of A226422

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A162132 A297051 A213412 * A277421 A171612 A053717

Adjacent sequences: A226425 A226426 A226427 * A226429 A226430 A226431

Keyword

nonn

Author

R. H. Hardin Jun 06 2013

Status

approved