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A189539
Number of arrangements of n+1 nonzero numbers x(i) in -3..3 with the sum of trunc(x(i)/x(i+1)) equal to zero
1
12, 28, 192, 964, 5416, 31280, 173792, 977092, 5562216, 31839976, 182830560, 1054020072, 6094150672, 35317631800, 205154575120, 1194077810020, 6961965310984, 40654382303400, 237732203953600, 1391919066252408
OFFSET
1,1
COMMENTS
Column 3 of A189545
LINKS
EXAMPLE
Some solutions for n=5
..1....3....3...-2...-1....2...-2....2....3...-2...-3...-3...-3....2....2....1
.-2....1....2...-2...-1....1....3....1....3...-2...-2....2....3....1...-1...-1
..2....2....3....2....1....3....3....2....3...-2....2....1....2...-3...-2....3
.-2...-2...-1....2...-3....2....3...-1...-3...-3...-3....3....1....2....3....3
.-1....1...-1...-3....2...-2....3....2....2....1...-2...-2...-2...-1....3....3
.-3....2...-1....3....2....1...-1...-3....3....1....2...-3....1...-1....2...-2
CROSSREFS
Sequence in context: A351104 A340685 A203026 * A000546 A130516 A045554
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 23 2011
STATUS
approved