A226418 - OEIS

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A226418

Number of nondecreasing -4..4 vectors of length n whose dot product with some lexicographically greater or equal nondecreasing -4..4 vector equals n

0

2, 25, 104, 411, 968, 2689, 5573, 12301, 22398, 41891, 71784, 124195, 196235, 313967, 479501, 730157, 1062596, 1548604

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A226422

LINKS

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

EXAMPLE

Some solutions for n=3

.-3...-3...-4...-1...-3...-3...-4...-2...-1...-2...-4...-3...-4...-3...-1...-3

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

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

CROSSREFS

Sequence in context: A181920 A123012 A175522 * A196011 A080515 A258943

Adjacent sequences: A226415 A226416 A226417 * A226419 A226420 A226421

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 06 2013

STATUS

approved