OFFSET
1,2
COMMENTS
Diagonal of A240706
EXAMPLE
Some solutions for n=3
..0..1..2....0..1..2....0..1..2....0..1..2....0..1..1....0..1..2....0..1..0
..2..2..1....1..2..3....2..3..1....3..2..1....2..1..1....2..3..0....2..0..3
..2..2..0....3..0..2....3..1..3....1..3..2....0..3..2....0..1..2....1..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 10 2014
STATUS
approved