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A200550
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Number of -5..5 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences
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1
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80, 836, 7778, 75792, 737460, 7286542, 72366820, 723237026, 7258296910, 73127883596, 739101010202, 7490787201124, 76099633989974, 774719436417776, 7901415122713726, 80719023935569240, 825814487838111514
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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....5....3....1...-3....2...-5...-1....0...-5...-4...-3...-5....0...-5....3
.-1....0...-2...-3....3...-4....5....5...-5...-3....3....2...-2...-3....1...-2
..0...-2....1....5...-1....1...-4...-3....4....1....0...-5....2....3....4....3
.-3...-2....0....2....2....1....3....3....4....3...-1....1....2....2...-2...-3
..1...-1...-2...-5...-1....0....1...-4...-3....4....2....5....3...-2....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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