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A189546 Number of arrangements of 3 nonzero numbers x(i) in -n..n with the sum of trunc(x(i)/x(i+1)) equal to zero 1
4, 8, 28, 72, 152, 264, 432, 660, 968, 1352, 1832, 2400, 3084, 3880, 4808, 5876, 7100, 8472, 10020, 11736, 13648, 15748, 18064, 20576, 23328, 26304, 29536, 33012, 36764, 40768, 45068, 49656, 54556, 59756, 65292, 71148, 77360, 83908, 90828, 98100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A189545

LINKS

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

EXAMPLE

Some solutions for n=5

..1...-5....1....4...-1....2....2...-3...-1....1....1...-5...-5....4...-1....3

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

..5....3...-4...-3....4...-5....5....5...-3...-3....4....1....3...-3...-4....5

CROSSREFS

Sequence in context: A306448 A090083 A034515 * A059480 A105723 A280118

Adjacent sequences:  A189543 A189544 A189545 * A189547 A189548 A189549

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 23 2011

STATUS

approved

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Last modified October 3 07:43 EDT 2022. Contains 357231 sequences. (Running on oeis4.)