OFFSET
1,1
COMMENTS
Diagonal of A223999
EXAMPLE
Some solutions for n=3
..0..0..1....0..1..2....0..0..2....1..2..2....0..1..1....0..0..0....0..2..2
..0..0..1....0..0..1....0..1..1....0..1..2....0..1..1....0..1..2....0..0..2
..0..1..1....0..1..2....0..1..1....1..1..1....0..2..2....1..2..2....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2013
STATUS
approved