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A190074
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Number of arrangements of 5 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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12, 144, 922, 3481, 9904, 23400, 48491, 92478, 162599, 270267, 430274, 655974, 965098, 1390174, 1947527, 2667906, 3590889, 4753865, 6198717, 7979654, 10128692, 12732119, 15867500, 19571053, 23904927, 29021539, 34967650, 41839570, 49768153
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OFFSET
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1,1
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COMMENTS
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Row 4 of A190071
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..200
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EXAMPLE
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Some solutions for n=4
.-1....1....4....4....1...-3....1...-2...-2....4...-1....1....4...-4....3...-2
..2....4...-4....2...-1...-3...-4...-3....4...-3....1....2...-2....3....1...-1
..1...-4....3...-1....3...-4....4....2....3...-3....3...-3....3...-2....2....2
..4...-3....1....3....4....2...-4....2...-2....4....3...-3....2...-4...-1...-1
.-3....3...-4....3....2...-3...-3...-3...-2....4...-4....3....1...-2....3...-1
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CROSSREFS
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Sequence in context: A188609 A206873 A188846 * A188853 A188503 A206879
Adjacent sequences: A190071 A190072 A190073 * A190075 A190076 A190077
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin May 04 2011
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STATUS
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approved
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