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A201800
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Number of zero-sum nX5 -2..2 arrays with every element unequal to at most two horizontal and vertical neighbors
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0
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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
.-1.-2.-2..0..0....1..1.-2..1..1...-1..1..1..1..1...-2.-1.-1..2.-2
..2..2..1..1.-1....0..0.-2.-2..2...-2.-2..1..0..0...-1..1..1..2..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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