OFFSET
1,1
COMMENTS
Diagonal of A205170
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..0..1..1..0....0..1..0..2..0....0..1..0..1..0
..0..1..0..2..2....0..1..1..0..2....3..3..0..1..3....0..0..2..1..1
..2..2..3..2..3....1..1..0..0..3....2..1..1..2..1....3..2..3..0..1
..3..1..1..2..1....1..3..0..1..0....1..0..2..0..3....1..1..1..2..1
..1..2..1..3..2....1..3..2..3..1....0..0..2..1..1....2..3..0..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2012
STATUS
approved