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A199845
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Number of -6..6 arrays x(0..n-1) of n elements with zero sum and no element more than one greater than the previous
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1
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1, 7, 32, 149, 630, 2600, 10426, 41079, 159330, 611698, 2329458, 8818874, 33234990, 124835120, 467743203, 1749482957, 6535398559, 24393753898, 91006458115, 339442473410, 1266045976128, 4722720042212, 17621749081077, 65775214030886
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=6
..0....4....6....6....1....2....4....6....6....5....6....6....3....4....5....5
..1....1....4....5....1....2...-2....2....4....2....4....2....2....2....6...-1
..2....2....0....2....0....1...-1...-1...-2....0....0...-2....2....2....1...-2
.-2....0...-1...-5....1....1....0...-1...-2...-3...-2...-3....0....2...-3...-1
.-1...-2...-5...-4....1...-1....0...-3...-1...-2...-4...-2...-2...-4...-5....0
..0...-5...-4...-4...-4...-5...-1...-3...-5...-2...-4...-1...-5...-6...-4...-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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