|
|
A221203
|
|
Number of 4 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.
|
|
1
|
|
|
0, 289, 212, 427716, 4984812, 1026177156, 30374196832, 3043294206016, 133567666236732, 10038761087929924, 525060302368983108, 34891927404610766400, 1974298747702764055248, 124298442666315631470276
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..1..2..0....0..2..2....0..2..2....0..2..0....0..2..0....0..2..1....0..2..1
..0..2..0....0..2..1....0..2..0....1..2..1....2..2..1....2..2..0....0..2..1
..0..2..2....0..2..1....0..2..1....2..2..0....0..2..0....0..2..0....1..2..0
..1..2..0....0..2..0....1..2..0....0..2..0....1..2..0....1..2..0....0..2..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|