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A190073
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Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero
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1
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0, 40, 166, 483, 1126, 2276, 4150, 6946, 10909, 16353, 23728, 33290, 45591, 61100, 80161, 103121, 130833, 163649, 202441, 247746, 300269, 360694, 430361, 508989, 598090, 698534, 811133, 936287, 1075989, 1230312, 1401309, 1589246, 1795222
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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=4
..4...-3...-3...-4....2...-4...-1...-1...-1...-4...-4....3....2....3...-2....1
.-4....3....3....1....3....3...-1....4....3...-3...-4....3...-1...-1...-4....4
..3....3....3....4...-2...-4...-3...-4....2....2...-4....2...-1...-4...-4...-3
..1...-4....4....1...-3...-3....2...-2....3....3....3...-1...-1...-3....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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