OFFSET
1,2
COMMENTS
Diagonal of A223104
EXAMPLE
Some solutions for n=3
..0..0..0....0..1..2....0..1..0....0..1..0....0..1..1....0..1..2....0..1..2
..0..1..0....0..1..1....0..2..2....1..2..1....0..2..0....2..0..1....2..2..1
..2..1..0....2..2..1....1..1..2....0..0..2....0..2..2....0..1..2....2..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2013
STATUS
approved