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!)
A267018 Number of n X n arrays containing n copies of 0..n-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo n and the upper left element equal to 0. 1
1, 3, 15, 137, 2063, 69265, 4893787, 787556232 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A267019.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267020.

Sequence in context: A195764 A113723 A113379 * A262911 A163949 A005816

Adjacent sequences:  A267015 A267016 A267017 * A267019 A267020 A267021

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 09 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 8 10:26 EDT 2022. Contains 356009 sequences. (Running on oeis4.)