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!)
A206961 Number of n X n 0..3 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal 0
4, 256, 188699, 1657999936, 178334417556473, 233756297269025517833, 3726713206845504722090161857 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A206967
LINKS
EXAMPLE
Some solutions for n=4
..1..3..0..1....2..3..1..3....1..3..2..1....1..3..2..1....3..1..1..2
..0..0..1..1....2..2..1..1....1..1..0..3....1..2..2..1....0..1..1..0
..0..1..1..3....3..2..0..1....2..3..3..0....0..2..0..3....0..0..3..0
..3..1..3..1....0..3..3..1....0..2..1..3....0..0..2..1....1..1..2..0
CROSSREFS
Sequence in context: A207529 A206968 A206789 * A206569 A207576 A209086
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2012
STATUS
approved

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 March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)