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A201985
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Number of nX3 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing
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1
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8, 1170, 134217, 11648559, 803133854, 46034224561, 2263314310579, 97590406110264, 3751608445033000, 130228399017523112, 4123679601987935141, 120106074216408355193, 3240091181028424814518, 81435648130636028973623
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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=3
.-3.-1..0...-3..0..1...-3.-2..3...-3..0..3...-3.-1..0...-2..0..3...-3.-3.-3
..1..1..1....0.-3..2...-3..0..2...-1..2.-2...-3..0..2...-2..3.-2...-1..1..1
..1..2.-2....2..1..0....2..3.-2....0.-1..2....1..1..3....2..1.-3....2..3..3
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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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