|
|
A207286
|
|
Number of nX4 0..3 arrays avoiding the pattern z-2 z-1 z in any row or column
|
|
1
|
|
|
241, 58081, 12359893, 2663436930, 572065794890, 122968569630173, 26429424077425891, 5680621805739504100, 1220959989610537371341, 262426428942956734097739, 56404478394058146229795829
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..1..3..0....1..1..1..3....1..0..3..2....1..3..2..1....2..3..1..3
..2..0..3..0....3..3..2..0....1..1..0..0....1..2..1..1....2..2..1..1
..2..0..3..1....0..2..1..1....3..1..3..0....0..2..0..3....3..2..0..1
..1..2..0..3....3..1..0..0....1..0..1..3....0..0..2..1....0..3..3..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|