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A201492
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Number of n X 4 zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing.
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1
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8, 1454, 301432, 50432052, 6697376240, 732383803600, 68110029402413, 5516712973977104, 396137884984421823, 25563298281912009949, 1498543207391775400633, 80501743778622446236710
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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
.-2..0..0..2...-2.-1..2..2...-2.-1..0..2...-1.-1..1..1...-2.-1..0..1
.-1..0..0..1...-2..1.-2..2....1..1..1.-2....1..1.-2..0....0..1.-1..2
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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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