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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A221296 Number of n X n arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2 0
1, 19, 2899, 4119299, 53074198285, 6137910765383119 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A221303

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A277000 A055415 A196541 * A287938 A225602 A195756

Adjacent sequences:  A221293 A221294 A221295 * A221297 A221298 A221299

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 22 16:43 EDT 2019. Contains 325225 sequences. (Running on oeis4.)