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A201986
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Number of nX4 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing
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3
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18, 14107, 11648559, 7375608084, 3674187761233, 1507315600099908, 526500713340421071, 160321266022658991751, 43304255513243305231273, 10515069913569825177115136, 2319701107323309166913311672
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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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
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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