|
|
A251002
|
|
Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than the absolute difference of its antidiagonal elements
|
|
0
|
|
|
69, 10743, 11671623, 87861924805, 4588026318857390, 1661795248800209092018, 4174999762523849415510268532, 72754439546501362273096881625623943, 8794003889120582191141511584460660923446950
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=2
..2..2..1....1..1..1....2..0..1....0..2..1....1..0..0....0..1..1....0..2..0
..1..2..2....1..0..0....2..0..1....1..1..2....0..2..2....2..1..1....2..2..0
..1..1..0....0..0..2....2..1..2....2..1..1....2..0..0....1..2..1....1..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|