OFFSET
1,3
COMMENTS
Diagonal of A202735
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..1..1..1....0..0..1..1....0..0..0..1....0..1..1..1....0..0..1..1
..0..1..0..2....0..1..1..2....0..1..1..2....0..0..1..2....0..1..0..2
..0..1..2..3....0..1..2..3....0..1..2..3....0..1..2..3....0..1..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 23 2011
STATUS
approved