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A201491 Number of nX3 zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing 1
5, 226, 9331, 301432, 7798656, 168357815, 3127432827, 51118964623, 747555368709, 9907361072523, 120219907134113, 1346895312283777, 14030077787811997, 136685387878719346, 1251770455347161910, 10823892860244631974 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A201496
LINKS
EXAMPLE
Some solutions for n=3
.-2..1..1...-2.-1.-1...-1.-1..1...-2.-1..2...-2..1..2...-2.-1..2...-2..0..0
.-2..1..1....0..0..0....1..2.-2...-1..0..1....0.-1..1...-2..1..1...-1.-1.-1
..0.-2..2....2..0..2....2..0.-2....1.-1..1....2.-1.-2...-1..1..1....1..2..2
CROSSREFS
Sequence in context: A263430 A339311 A200988 * A181584 A300390 A002142
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 02 2011
STATUS
approved

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Last modified July 17 10:03 EDT 2024. Contains 374375 sequences. (Running on oeis4.)