|
|
A224304
|
|
Number of n X n 0..2 arrays with diagonals and rows unimodal and antidiagonals nondecreasing
|
|
0
|
|
|
3, 54, 1586, 45453, 1258372, 33934344, 911404794, 24751091876, 685844521863, 19455144713950, 564670981724616, 16727123708223072, 504154243224589510, 15415190705591603814
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..1..1..0....0..0..0....0..0..0....0..1..1....2..0..0....1..1..0....0..0..0
..2..1..1....2..0..0....1..2..0....1..2..0....0..2..1....2..1..1....1..0..0
..2..1..1....0..1..2....2..1..1....2..1..1....2..2..0....1..1..1....2..1..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|