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!)
A199525 Number of -3..3 arrays x(0..n-1) of n elements with zero sum and no two consecutive zero elements 1
1, 6, 36, 212, 1324, 8342, 53302, 343710, 2232322, 14582218, 95702528, 630544704, 4168091856, 27630031358, 183604587444, 1222672695812, 8157398577024, 54515075729370, 364861668341252, 2445239266293460, 16407415704050100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A199530

LINKS

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

EXAMPLE

Some solutions for n=5

..3...-2...-3...-1....0....1....3...-2....1....3...-2....0....1....2...-3....3

.-3....1....2....1....2....3....0....0...-3....3....0...-3...-3....1...-1...-2

..2....1...-3....0...-2...-1....1....2....0...-3...-1....1....2...-2....3....1

.-3....3....3....1...-2...-1...-3...-2...-1....0....3....2....1...-3...-2...-2

..1...-3....1...-1....2...-2...-1....2....3...-3....0....0...-1....2....3....0

CROSSREFS

Sequence in context: A268454 A171280 A250348 * A074436 A036162 A061708

Adjacent sequences:  A199522 A199523 A199524 * A199526 A199527 A199528

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 07 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 January 17 17:47 EST 2022. Contains 350402 sequences. (Running on oeis4.)