OFFSET
1,2
COMMENTS
Diagonal of A209744
EXAMPLE
Some solutions for n=5
..0..0..0..0..1....0..0..0..1..1....0..0..0..0..0....0..0..0..0..0
..1..2..1..2..0....1..2..1..2..0....1..2..1..2..1....1..2..1..2..1
..0..1..0..0..3....1..0..0..0..3....0..0..0..0..0....0..1..0..2..3
..1..2..1..2..2....3..3..4..1..0....1..2..1..2..1....1..4..4..0..2
..0..2..3..1..0....1..4..5..4..0....0..0..1..0..0....5..5..2..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 12 2012
STATUS
approved