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A226393 Number of nondecreasing -2..2 vectors of length n whose dot product with some nonincreasing -2..2 vector equals n 1
2, 12, 12, 48, 38, 128, 92, 282, 182, 540, 322, 948, 540, 1546, 836, 2394, 1244, 3544, 1790, 5070, 2488, 7036, 3366, 9530, 4478, 12626, 5818, 16428, 7446, 21022, 9402, 26524, 11706, 33032, 14400, 40678, 17564, 49570, 21186, 59854, 25352, 71650, 30116 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A226398
LINKS
EXAMPLE
All solutions for n=3
..1....1...-2...-1....0...-1...-2....0...-2...-1....1...-2
..1....1...-1...-1....1...-1...-2....1...-2....2....2...-1
..1....2....0...-1....2....0....1....1...-1....2....2...-1
CROSSREFS
Sequence in context: A168457 A045895 A251421 * A371375 A198532 A198477
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 06 2013
STATUS
approved

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Last modified July 13 08:08 EDT 2024. Contains 374274 sequences. (Running on oeis4.)