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A190072 Number of arrangements of 3 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 1
4, 12, 36, 76, 143, 233, 366, 536, 760, 1028, 1363, 1751, 2221, 2758, 3387, 4096, 4907, 5804, 6819, 7931, 9174, 10525, 12021, 13631, 15401, 17299, 19366, 21572, 23959, 26490, 29220, 32114, 35210, 38476, 41963, 45629, 49527, 53618, 57953, 62489, 67285 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A190071

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for n=4

.-1....1....4...-2...-1....1...-3...-4...-2...-1...-1....2...-4...-3....3....1

..3...-1...-4...-4....1....3...-3...-3....3...-3...-1....2...-2....4...-3...-1

..2...-3...-4....4....1....4....3....2....2....4....1...-2....1....4...-4...-2

CROSSREFS

Sequence in context: A095735 A020875 A307182 * A063810 A183931 A320967

Adjacent sequences:  A190069 A190070 A190071 * A190073 A190074 A190075

KEYWORD

nonn

AUTHOR

R. H. Hardin May 04 2011

STATUS

approved

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Last modified July 31 21:39 EDT 2021. Contains 346377 sequences. (Running on oeis4.)