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!)
A206789 Number of n X n 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal. 0

%I

%S 4,256,180446,1382766472,120305843593958,118056098980249594900

%N Number of n X n 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.

%C Diagonal of A206797.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A206797.

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 12 2012

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 1 11:09 EDT 2022. Contains 354972 sequences. (Running on oeis4.)