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A201984 Number of nX2 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing 1
4, 77, 1170, 14107, 139471, 1177568, 8721417, 57801225, 347923603, 1924356711, 9871703167, 47329086175, 213435856527, 910247506472, 3688234465315, 14255722610693, 52746861442115, 187406263165391, 641125854338628 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A201989

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..177

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A080989 A006267 A273952 * A210519 A279437 A296997

Adjacent sequences:  A201981 A201982 A201983 * A201985 A201986 A201987

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 07 2011

STATUS

approved

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Last modified April 24 09:54 EDT 2019. Contains 322420 sequences. (Running on oeis4.)