login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A197367 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,4,1,0,1 for x=0,1,2,3,4 0
1, 1, 32, 161, 7485, 509018, 79831388, 27751402365, 20901475723923, 34381589920722561, 123453405715147118697 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Every 0 is next to 0 2's, every 1 is next to 1 4's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 1's

Diagonal of A197373

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions containing all values 0 to 4 for n=4

..0..0..3..0....2..1..0..0....0..0..1..2....0..0..3..0....0..3..0..0

..0..1..0..0....1..4..1..0....0..1..4..1....0..1..0..3....3..0..1..0

..1..4..1..0....0..1..0..0....0..0..1..0....1..4..1..0....0..1..4..1

..2..1..0..0....0..0..3..0....0..3..0..0....2..1..0..0....0..0..1..2

CROSSREFS

Sequence in context: A299804 A299680 A300312 * A297843 A172191 A304381

Adjacent sequences:  A197364 A197365 A197366 * A197368 A197369 A197370

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 14 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 26 02:10 EDT 2021. Contains 346294 sequences. (Running on oeis4.)