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A189950
1/4 the number of arrangements of n+1 nonzero numbers x(i) in -8..8 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero
1
20, 103, 1350, 22220, 327880, 4678100, 68081570, 1012894742, 15245829657, 230937539015, 3515809056902, 53766069905706, 825394005427540, 12711935460761503, 196311914160978767, 3038824326513268799
OFFSET
1,1
COMMENTS
Column 8 of A189951
LINKS
EXAMPLE
Some solutions with n=3
.-6...-6...-5....7....1...-2...-3....7...-6....7....3....6....1....7...-2....5
.-6...-5....2...-2....4....8....2....3...-1....2...-5...-3....4...-1....8....2
.-1....2....1...-1...-5...-6...-5...-4....6...-3....7....8...-5....6...-6...-1
..1....7...-3....2...-6....1....4...-5...-5...-4....5....5...-8....5...-3....3
CROSSREFS
Sequence in context: A071334 A241355 A220207 * A045768 A088831 A063785
KEYWORD
nonn
AUTHOR
R. H. Hardin May 02 2011
STATUS
approved