login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A189957 1/4 the number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero 1
64, 4632, 72744, 542353, 2514945, 9133420, 26586582, 68081570, 154928607, 325585559, 631690148, 1167609345, 2043508680, 3435508142, 5566095860, 8767568010, 13387924849, 20010820026, 29195103851, 41845814529, 58906853906 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 7 of A189951
LINKS
EXAMPLE
Some solutions with n=3
..1...-3....1....2...-1....3....2....2....3...-1....2...-1....1....2....1....2
..1...-3...-3...-3...-3...-3...-3....1....1...-3...-3....1....1....1...-3...-3
.-3...-2...-1....2...-3...-1...-2....2....1....3...-1....2....1....2....3...-2
..1....2...-1....1....3....1...-1...-1...-2....3....2...-3....3....1...-3...-3
.-3....3....3....1...-2...-3...-1...-1...-2....1...-1...-2...-2....1...-1....3
.-1...-3....3...-1...-2...-3....1...-3...-3...-2...-1...-3...-2...-1....3....3
.-3...-3...-3...-2...-2....2...-1....3....1....2...-1....1...-3...-1....3....2
.-2...-2...-1....1...-1...-2....3....1....3....1....3....1...-3...-3...-3...-2
CROSSREFS
Sequence in context: A099369 A249393 A208708 * A146496 A058874 A302264
KEYWORD
nonn
AUTHOR
R. H. Hardin May 02 2011
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 18 04:31 EDT 2024. Contains 371767 sequences. (Running on oeis4.)