OFFSET
1,2
COMMENTS
Diagonal of A199655
EXAMPLE
Some solutions for n=3
..0..1..0....0..0..1....0..1..2....0..0..1....0..1..0....0..1..1....0..0..0
..0..0..1....1..0..2....0..1..2....2..2..2....2..0..0....1..2..2....0..1..1
..2..0..1....2..1..0....1..1..0....1..1..2....2..0..1....1..2..1....0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 08 2011
STATUS
approved