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!)
A222721 Number of nX5 0..3 arrays with exactly floor(nX5/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order 0
20, 6524, 2807505, 1928517786, 662075303107, 474459483232672, 159780846921127290, 118321716926292008569 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A222722
LINKS
EXAMPLE
Some solutions for n=3
..0..0..1..2..1....0..0..1..0..1....0..0..1..2..0....0..0..1..2..0
..0..0..3..2..0....0..2..3..2..0....1..0..2..1..3....0..2..0..2..1
..1..2..0..2..3....2..3..1..3..2....2..1..0..0..2....1..2..1..3..0
CROSSREFS
Sequence in context: A123379 A175015 A135292 * A223051 A222744 A234459
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 03 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 July 13 17:35 EDT 2024. Contains 374284 sequences. (Running on oeis4.)