|
| |
|
|
A207803
|
|
Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically.
|
|
1
|
|
|
|
2, 16, 102, 1970, 57184, 3511534, 388134978, 82999241712, 33304563708790, 25409866877400042, 36648009080479725120, 100161609586888545878490, 518205987191621802807914102, 5077481011895003740693688753360
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
Some solutions for n=4
..1..0..1..1....1..1..0..0....0..1..0..0....0..1..1..0....1..0..1..1
..0..1..0..0....1..1..1..0....0..1..1..0....0..1..1..0....0..1..1..0
..0..1..0..0....0..1..1..1....0..1..1..0....1..0..1..0....0..1..0..0
..1..0..1..0....0..1..1..1....0..1..1..1....1..0..1..1....0..1..0..0
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
