|
|
A275031
|
|
Number of n X n 0..2 arrays with no element equal to any value at offset (0,-1), (-1,-2) or (-2,0) and new values introduced in order 0..2.
|
|
0
|
|
|
1, 6, 46, 570, 11624, 421793, 26631796, 2976710318, 583268028453, 200678789857876, 121566258532250545, 129693591124665273124, 243968254768827185678164
(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..1. .0..1..0..2. .0..1..2..0. .0..1..0..1
..1..2..1..2. .0..2..1..0. .0..2..1..2. .2..0..2..0. .0..2..1..0
..1..0..2..0. .1..0..1..0. .1..0..1..0. .1..2..1..2. .1..0..2..0
..0..1..0..1. .2..1..0..2. .2..1..0..1. .0..1..0..1. .2..1..2..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|