OFFSET
1,2
COMMENTS
Diagonal of A204685.
EXAMPLE
Some solutions for n=5
..0..1..1..0..2....0..0..1..1..0....0..0..1..0..2....0..0..1..0..0
..2..3..1..3..3....2..0..3..3..0....2..1..1..3..2....0..2..3..1..1
..0..0..3..2..3....2..3..1..0..3....0..1..0..3..3....2..0..1..0..0
..3..2..0..1..2....0..3..2..1..0....2..2..3..2..0....0..0..3..0..1
..0..3..3..1..2....2..2..3..0..0....1..0..3..3..2....1..2..1..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 18 2012
STATUS
approved