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A201986 Number of nX4 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing 3
18, 14107, 11648559, 7375608084, 3674187761233, 1507315600099908, 526500713340421071, 160321266022658991751, 43304255513243305231273, 10515069913569825177115136, 2319701107323309166913311672 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A201989

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..12

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Sequence in context: A248804 A060617 A222202 * A153301 A129042 A262359

Adjacent sequences:  A201983 A201984 A201985 * A201987 A201988 A201989

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 07 2011

STATUS

approved

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Last modified April 21 20:59 EDT 2019. Contains 322328 sequences. (Running on oeis4.)