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!)
A200189 Number of -5..5 arrays x(0..n-1) of n elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing 1
1, 10, 44, 242, 1298, 7266, 40632, 231916, 1320876, 7630236, 43951298, 255926506, 1485664226, 8700154180, 50792100530, 298703878402, 1751415860436, 10333766393384, 60797757383394, 359661008763242, 2121869963574120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A200192

LINKS

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

EXAMPLE

Some solutions for n=5

.-1...-3....4....2....1...-4...-5...-1...-1...-1....2....2...-3....0....2...-3

..2....5...-4....4...-4....3....2...-5....5....4...-4....4....5....4....5....5

.-4...-2....1...-3....5...-3...-3....3...-4...-1....2...-5...-3...-3...-5...-1

..4....1...-2....0...-2....5....4...-1....1....1...-3....1....2....1....0....2

.-1...-1....1...-3....0...-1....2....4...-1...-3....3...-2...-1...-2...-2...-3

CROSSREFS

Sequence in context: A281993 A126397 A164607 * A240383 A160970 A202296

Adjacent sequences:  A200186 A200187 A200188 * A200190 A200191 A200192

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 14 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 20 10:18 EST 2022. Contains 350471 sequences. (Running on oeis4.)