OFFSET
1,3
COMMENTS
Diagonal of A222402
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..0..0....0..1..2..1....0..1..0..1
..0..0..0..1....0..0..0..0....0..0..0..0....2..2..2..2....0..0..0..0
..0..0..0..1....1..1..0..0....0..0..0..0....2..2..2..2....0..0..0..0
..0..0..0..2....1..1..0..0....0..1..1..2....2..2..2..2....0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 18 2013
STATUS
approved