OFFSET
1,1
COMMENTS
Diagonal of A254422
EXAMPLE
Some solutions for n=2
..0..2..2....1..0..2....0..2..2....0..1..2....1..2..0....2..2..0....0..2..0
..0..2..1....2..1..1....1..2..2....2..1..0....1..2..2....2..2..1....2..2..0
..0..2..1....2..1..0....1..2..0....0..0..0....0..2..2....0..2..1....0..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2015
STATUS
approved