OFFSET
1,1
COMMENTS
Diagonal of A209848
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..0..0..0..1....0..0..0..0..1....0..1..1..1..1
..0..0..1..1..0....1..0..0..1..0....0..0..2..0..0....0..0..0..0..1
..1..0..0..1..0....0..0..0..0..0....1..0..2..0..3....2..0..0..1..0
..0..0..1..1..0....1..1..0..0..2....0..0..2..0..3....0..2..0..0..0
..0..0..0..1..0....2..1..0..0..2....1..0..2..0..3....2..0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2012
STATUS
approved