|
| |
|
|
A265657
|
|
Number of 3Xn arrays containing n copies of 0..3-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0.
|
|
1
|
|
|
|
1, 7, 20, 104, 476, 2428, 12362, 64454, 342054, 1828533, 9928762, 54157257, 298686238, 1653956425, 9228016750, 51675269021, 290902199460, 1642884250719, 9314059354170, 52950162099266, 301906974462620, 1725418938358656
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..1..0..2....0..1..2..0....0..0..1..2....0..1..1..0....0..1..2..0
..0..1..0..1....2..1..2..1....2..2..1..2....2..2..2..2....0..1..2..0
..2..2..2..1....2..1..0..0....1..0..1..0....0..1..1..0....2..1..2..1
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
