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A189947
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1/4 the number of arrangements of n+1 nonzero numbers x(i) in -5..5 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero
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1
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10, 39, 306, 3247, 31284, 280284, 2514945, 23257218, 219695998, 2090461716, 19931671853, 190527865384, 1828012347661, 17602780129116, 169999647974922, 1645503998030853, 15958170796668622, 155032669862412399
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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 with n=3
..1...-2...-5....2...-5....4...-1...-2....3....2...-1...-2...-1....1....4...-4
..3....3....4...-2...-5...-4...-4...-1....1....4....3...-2...-4...-3...-3...-4
.-1...-5....1....1...-1...-4....1...-1....1...-3....1....1....1...-1...-1....2
.-3...-2....4....1...-1...-4....3....1...-1....4....4...-1...-4...-4....5...-2
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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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