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A188174
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Number of strictly increasing arrangements of n numbers in -(2n-2)..(2n-2) with sum zero
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1
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1, 2, 8, 43, 252, 1636, 11322, 81805, 610358, 4672836, 36525052, 290399543, 2342043630, 19118822650, 157709971144, 1312796873451, 11015236989702, 93078467831012, 791462018168032, 6767910089071288, 58167781282121262
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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=5
.-8...-7...-4...-6...-6...-7...-8...-8...-5...-5...-7...-6...-5...-7...-4...-7
.-6...-4...-2...-5...-5...-2...-1...-3...-2...-2...-5...-4...-3...-3...-3...-4
.-1....1....0...-3....1....1....0...-1...-1...-1....0...-1...-1....2...-1....1
..7....4....2....6....3....3....1....5....0....1....4....3....3....3....3....2
..8....6....4....8....7....5....8....7....8....7....8....8....6....5....5....8
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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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