OFFSET
1,1
COMMENTS
Diagonal of A230708
EXAMPLE
Some solutions for n=2
..0..x..2..x..2....0..x..0..x..1....0..x..2..x..2....0..x..0..x..1
..x..1..x..0..x....x..1..x..2..x....x..1..x..0..x....x..1..x..2..x
..0..x..2..x..1....2..x..1..x..0....0..x..1..x..2....0..x..2..x..1
..x..1..x..2..x....x..0..x..1..x....x..2..x..0..x....x..2..x..0..x
..0..x..0..x..1....2..x..2..x..0....1..x..1..x..2....1..x..1..x..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 28 2013
STATUS
approved