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!)
A202509 Number of zero-sum -6..6 arrays of n elements with first through third differences also in -6..6 1
1, 7, 47, 217, 1041, 5429, 29295, 161469, 890659, 4953959, 27653867, 154912145, 870424381, 4906927687, 27742701519, 157251702011, 893270398075, 5083772866943, 28979759201581, 165434751255111, 945621770041509 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A202511

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..127

EXAMPLE

Some solutions for n=7

..1...-3....3...-4....5...-2....5...-5....3....5....1....0...-6....2....0...-4

.-2....3....4....1....2...-2...-1...-1...-1....2....3....0...-6...-1....6...-4

.-5....5....3....0....2...-3...-2....3...-1....3....2...-1...-2...-1....6...-4

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

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

..4...-4...-6....0...-2....3....2...-1....0...-5...-1....1....6...-1...-6....4

..6...-2...-4....6...-3...-1...-2....1...-5...-6...-6...-2....2...-2...-5....5

CROSSREFS

Sequence in context: A152988 A336789 A201437 * A009202 A093112 A091516

Adjacent sequences:  A202506 A202507 A202508 * A202510 A202511 A202512

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 20 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 29 09:31 EDT 2021. Contains 346344 sequences. (Running on oeis4.)