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!)
A233161 Number of n X n 0..7 arrays with no element x(i,j) adjacent to itself or value 7-x(i,j) horizontally, diagonally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 4 5 and 6, 2 appearing before 3 4 and 5, and 3 appearing before 4 in row major order (unlabelled 8-colorings with no clashing color pairs) 1
1, 1, 96, 28672, 31457280, 133143986176, 2216615441596416, 146421031085069565952, 38534510500216304943759360, 40485591044789076510300958621696 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Diagonal of A233168
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..2....0..1..2..1....0..1..2..1....0..1..7..1....0..1..2..6
..3..5..3..6....5..3..7..3....5..3..0..3....2..3..5..3....5..3..0..4
..0..6..0..2....0..6..5..6....0..6..2..1....1..7..6..7....7..6..5..1
..4..2..3..6....2..4..7..3....5..3..0..4....4..5..3..5....5..4..7..3
CROSSREFS
Sequence in context: A203489 A208794 A276099 * A269090 A232522 A296061
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 05 2013
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 July 18 15:44 EDT 2024. Contains 374388 sequences. (Running on oeis4.)