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!)
A183812 1/81 the number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 0
1, 162, 163208, 1042063656, 41531687999736, 10425296660739253420 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A183819
LINKS
EXAMPLE
Some solutions with upper left block zero for 3X3
..0..0..2....0..0..0....0..0..2....0..0..0....0..0..2....0..0..0....0..0..0
..0..0..0....0..0..1....0..0..1....0..0..2....0..0..2....0..0..1....0..0..1
..2..2..0....0..1..2....1..1..1....1..1..1....1..2..1....2..0..1....1..2..1
CROSSREFS
Sequence in context: A291131 A209965 A230837 * A036914 A325063 A214185
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 07 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 22 05:00 EDT 2024. Contains 371887 sequences. (Running on oeis4.)