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!)
A238316 Number of (n+1)X(n+1) 0..2 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors 0
3, 67, 4294, 721939, 459256128, 1266938409578, 13394202897232848, 504070949140994691397 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A238323

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A342505 A186208 A217625 * A182367 A091872 A079320

Adjacent sequences:  A238313 A238314 A238315 * A238317 A238318 A238319

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 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 10:11 EST 2021. Contains 349543 sequences. (Running on oeis4.)