login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A200160 Number of -3..3 arrays x(0..n-1) of n elements with nonzero sum and with zero through n-1 differences all nonzero 0
6, 24, 128, 576, 2778, 12440, 57992, 262444, 1202540, 5463896, 24922570, 113239064, 515471532, 2342330752, 10649798938 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A200165

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A188232 A274072 A224662 * A219622 A052170 A027224

Adjacent sequences:  A200157 A200158 A200159 * A200161 A200162 A200163

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 13 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 24 00:28 EDT 2021. Contains 346265 sequences. (Running on oeis4.)