login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A202918 Number of n X n nonnegative integer arrays with each row and column increasing from zero by 0, 1, 2 or 3 0
1, 4, 90, 11016, 7083180, 23491810780, 398328574277322, 34356415364024198698, 15026792073190842661982128, 33259034071925704355191308972010 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A202924

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

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

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

..0..3..4..7....0..3..4..7....0..1..4..7....0..1..4..6....0..0..2..3

CROSSREFS

Sequence in context: A240379 A304190 A274056 * A146506 A202575 A201721

Adjacent sequences:  A202915 A202916 A202917 * A202919 A202920 A202921

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 26 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 May 25 22:17 EDT 2019. Contains 323576 sequences. (Running on oeis4.)