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!)
A223969 Number of n X n 0..2 arrays with rows and antidiagonals unimodal 0
3, 81, 9515, 2558848, 1140963027, 715985189481, 574360426081996, 553932588795530549, 616038706732274614176, 766990732794703992309550, 1046181711135056928867576316, 1538264672813438079567996935803 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223975

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A207222 A207007 A223783 * A207202 A206856 A206951

Adjacent sequences: A223966 A223967 A223968 * A223970 A223971 A223972

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 30 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 4 10:00 EST 2023. Contains 360046 sequences. (Running on oeis4.)