|
|
A223955
|
|
Number of n X n 0..3 arrays with antidiagonals unimodal and rows and diagonals nondecreasing
|
|
0
|
|
|
4, 85, 3471, 176893, 9779558, 556027700, 31770135236, 1805384910990, 101606391647751, 5657068092397559, 311737148953336261, 17023765723406625834, 922742812050648219706
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..0..1..2....0..0..0....0..2..2....1..2..3....0..0..3....1..1..1....0..3..3
..1..2..2....0..0..1....2..2..2....1..1..2....3..3..3....2..3..3....0..0..3
..2..2..2....1..2..3....0..2..2....0..1..2....2..3..3....2..2..3....0..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|