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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A250519 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction 9
120, 889, 889, 5996, 14660, 5996, 39187, 205022, 205022, 39187, 248942, 2817780, 5941982, 2817780, 248942, 1555689, 36999777, 166583429, 166583429, 36999777, 1555689, 9605300, 480626844, 4464289109, 9680713976, 4464289109, 480626844 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......120.........889...........5996.............39187...............248942

......889.......14660.........205022...........2817780.............36999777

.....5996......205022........5941982.........166583429...........4464289109

....39187.....2817780......166583429........9680713976.........529549691761

...248942....36999777.....4464289109......529549691761.......59401819473382

..1555689...480626844...117638074883....28601087487209.....6541261035659334

..9605300..6146257386..3049397341176..1507593926459193...703840057362860071

.58826247.78207667892.78567969110807.79158901718859170.75185443088320314794

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..197

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 7]

k=2: [order 19]

k=3: [order 50]

EXAMPLE

Some solutions for n=2 k=4

..0..0..0..0..0....0..0..0..0..1....0..0..0..0..0....0..0..0..0..0

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

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

CROSSREFS

Sequence in context: A300664 A029573 A211471 * A250512 A011245 A213875

Adjacent sequences:  A250516 A250517 A250518 * A250520 A250521 A250522

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Nov 24 2014

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 December 5 12:24 EST 2021. Contains 349557 sequences. (Running on oeis4.)