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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A196679 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,0,1,2,3 for x=0,1,2,3,4 0
1, 9, 58, 2245, 188078, 39696088, 23029545105, 36239510088523 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

Diagonal of A196685

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A322207 A196293 A196211 * A276450 A276648 A308353

Adjacent sequences:  A196676 A196677 A196678 * A196680 A196681 A196682

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 05 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 October 19 01:25 EDT 2019. Contains 328211 sequences. (Running on oeis4.)