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!)
A197468 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4 0

%I #6 Dec 18 2015 18:17:49

%S 1,2,26,184,5408,165200,16544206,2117012786,779857304215,

%T 396015611721478,546971557228648382

%N Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4

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

%C Diagonal of A197475

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

%e ..1..2..0..2....0..3..0..2....1..1..0..1....2..0..3..0....2..0..2..1

%e ..1..0..4..0....2..0..4..0....2..0..3..1....0..4..0..1....0..4..0..1

%e ..0..3..0..3....1..3..0..1....0..4..0..2....3..0..2..1....3..0..4..0

%e ..1..1..2..0....1..0..2..1....2..0..3..0....0..1..1..0....0..3..0..2

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 15 2011

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 August 26 07:40 EDT 2024. Contains 375454 sequences. (Running on oeis4.)