OFFSET
1,1
COMMENTS
Diagonal of A207550
EXAMPLE
Some solutions for n=4
..0..2..0..2....2..0..0..1....0..2..2..0....0..2..2..2....2..2..1..2
..2..2..0..2....1..1..0..1....1..0..0..0....1..1..0..2....2..1..0..0
..2..0..1..0....0..0..1..0....0..2..1..2....0..0..1..0....1..1..1..0
..0..2..1..0....1..1..0..0....0..0..0..0....1..2..0..2....0..1..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 18 2012
STATUS
approved