|
|
A233837
|
|
Number of (n+2)X(n+2) 0..3 arrays with no increasing sequence of length 3 horizontally or antidiagonally downwards
|
|
1
|
|
|
201664, 1909001345, 220722832237568, 309991751661980537856, 5282676168847397906091279616, 1092733829722948057628861796014602753, 2743515983406193863098184416154650757282395648
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=1
..0..3..3....0..3..0....1..2..0....2..0..1....1..1..3....1..3..2....1..0..1
..1..3..3....0..3..1....0..1..1....0..3..1....1..0..3....1..0..1....0..2..1
..2..2..1....2..3..2....1..2..0....0..3..2....3..2..0....0..3..1....0..3..3
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|