OFFSET
1,1
COMMENTS
Diagonal of A219714
EXAMPLE
Some solutions for n=3
..1..0..0....0..0..0....0..0..0....1..0..0....0..0..0....1..0..0....0..0..0
..1..0..2....0..0..0....0..0..3....1..0..2....0..0..1....1..0..1....0..0..2
..2..2..3....2..0..1....3..0..0....2..1..1....3..1..2....3..1..1....3..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 26 2012
STATUS
approved