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!)
A226398 T(n,k)=Number of nondecreasing -k..k vectors of length n whose dot product with some nonincreasing -k..k vector equals n 12
2, 2, 2, 2, 12, 2, 2, 20, 12, 2, 2, 32, 68, 48, 2, 2, 48, 120, 146, 38, 2, 2, 64, 224, 448, 258, 128, 2, 2, 88, 344, 912, 874, 756, 92, 2, 2, 112, 552, 1646, 2674, 2498, 1012, 282, 2, 2, 136, 752, 2812, 5272, 6900, 4280, 1866, 182, 2, 2, 168, 1100, 4564, 10554, 17812 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.2...2....2.....2.....2......2......2.....2......2.....2.....2....2...2.2

.2..12...20....32....48.....64.....88...112....136...168...208..232.280

.2..12...68...120...224....344....552...752...1100..1398..1904.2356

.2..48..146...448...912...1646...2812..4564...6826..9996.14208

.2..38..258...874..2674...5272..10554.18170..30814.48204

.2.128..756..2498..6900..17812..37358.72000.130722

.2..92.1012..4280.15614..41428.109062

.2.282.1866.10992.37804.112060

.2.182.3762.18566.74606

.2.540.5020.32056

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..97

EXAMPLE

Some solutions for n=3 k=4

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

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

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

CROSSREFS

Sequence in context: A147822 A316497 A084961 * A248768 A334509 A029643

Adjacent sequences:  A226395 A226396 A226397 * A226399 A226400 A226401

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jun 06 2013

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 October 24 20:35 EDT 2021. Contains 348233 sequences. (Running on oeis4.)