|
|
A222017
|
|
Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out straight through or left turns
|
|
2
|
|
|
13, 1363, 86088, 5925053, 403317044, 27460842224, 1870475750419, 127385479747138, 8675741759311142, 590866503322144180, 40241368935424750183, 2740665723881270704902, 186654894043998446085330
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..1..0..1..1....0..3..1..2....1..0..0..1....0..1..2..0....2..2..2..2
..0..3..1..2....0..0..0..0....1..4..0..3....2..1..2..0....0..0..0..0
..1..1..0..1....2..1..3..0....0..1..1..0....2..0..2..0....1..1..0..2
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|