OFFSET
1,2
COMMENTS
Diagonal of A221303
EXAMPLE
Some solutions for n=3
..1..0..2....1..2..0....1..1..1....0..1..2....2..1..0....0..0..2....0..2..1
..2..1..1....0..2..1....0..1..1....1..1..1....0..0..2....1..2..2....2..1..1
..0..0..2....2..1..0....0..2..2....1..1..1....2..1..1....0..2..0....0..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2013
STATUS
approved