A226337 Number of nondecreasing -5..5 vectors of length n whose dot product with some other -5..5 vector equals n.

2, 50, 242, 972, 2857, 7951, 19046, 43667, 91607, 184623, 351192, 646548, 1141473, 1960891, 3264879, 5311415, 8429947, 13122714, 20020724, 30044769, 44339233, 64511381, 92542864, 131127774, 183555267, 254185657, 348298202, 472732818

Offset

1,1

Comments

Column 5 of A226340.

Links

R. H. Hardin, Table of n, a(n) for n = 1..30

Example

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

Crossrefs

Cf. A226340.

Sequence in context: A265962 A318094 A226408 * A048610 A007511 A016032

Adjacent sequences: A226334 A226335 A226336 * A226338 A226339 A226340

Keyword

nonn

Author

R. H. Hardin, Jun 04 2013

Status

approved