OFFSET
1,1
COMMENTS
Diagonal of A250707
EXAMPLE
Some solutions for n=2
..0..0..1....0..0..1....0..0..0....0..0..1....0..0..2....0..0..1....1..2..1
..0..0..2....0..1..2....0..3..1....0..1..1....0..1..2....0..0..1....2..1..3
..0..0..3....3..1..2....2..1..3....1..0..2....2..3..3....1..3..3....1..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 26 2014
STATUS
approved