OFFSET
1,2
COMMENTS
Diagonal of A202988
EXAMPLE
Some solutions for n=3
..1..2..2....0..1..2....1..0..0....2..2..2....2..1..0....1..1..0....0..2..0
..1..2..2....2..2..2....2..2..1....1..1..2....2..2..0....1..1..1....2..2..2
..1..1..1....2..2..2....0..2..2....1..1..1....0..0..2....1..1..1....1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 26 2011
STATUS
approved