|
| |
|
|
A221359
|
|
Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2
|
|
1
|
|
|
|
0, 292, 18738, 1388784, 93433746, 6308646549, 423812250312, 28479671473807, 1913505400121105, 128574419200721801, 8639424408948675486, 580522160326792409378, 39007927353168721454490, 2621116666944612733670859
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
Some solutions for n=3
..1..1..2..1....0..1..2..0....1..2..2..1....1..1..2..1....1..1..1..2
..1..0..1..1....2..0..1..1....0..2..0..1....1..1..1..2....1..0..2..2
..1..2..1..0....2..0..2..1....1..0..1..1....1..0..1..0....0..1..0..1
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
