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!)
A221346 Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2 1
1, 137, 2856, 66077, 1534835, 36054361, 849482126, 20037479191, 472778990849, 11155734923302, 263229189709284, 6210988381194727, 146547761557950631, 3457733626802911867, 81582980136833112390, 1924884328527038591459 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 3 of A221345
LINKS
EXAMPLE
Some solutions for n=3
..2..2..0....1..1..2....1..1..0....2..1..2....0..2..2....0..1..1....1..2..1
..2..0..1....0..1..1....1..1..0....0..0..0....1..0..0....1..2..2....1..1..1
..0..2..0....1..0..2....2..1..2....1..2..1....1..2..1....1..1..0....1..0..1
CROSSREFS
Sequence in context: A215864 A190307 A094488 * A138348 A278175 A261973
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 11 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 24 11:31 EDT 2024. Contains 374583 sequences. (Running on oeis4.)