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A226409 Number of nondecreasing -6..6 vectors of length n whose dot product with some nondecreasing -6..6 vector equals n 0
2, 66, 358, 1709, 5567, 18389, 47291, 123883, 285370, 642627, 1330101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A226410

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

.-5...-1....2....1...-6...-5....1...-2....1...-5...-6...-6...-6...-2....0...-4

.-1....2....2....3...-3...-1....4....0....3....3...-3....1....2....5....0....5

..2....2....3....6....5...-1....5....3....3....5...-3....1....5....6....3....6

CROSSREFS

Sequence in context: A304934 A075809 A257788 * A226338 A131472 A098532

Adjacent sequences:  A226406 A226407 A226408 * A226410 A226411 A226412

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 06 2013

STATUS

approved

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Last modified February 18 02:57 EST 2020. Contains 332006 sequences. (Running on oeis4.)