OFFSET
1,1
COMMENTS
Diagonal of A240039
EXAMPLE
Some solutions for n=3
..2..1..1....1..2..1....2..1..2....1..2..2....2..1..2....1..2..2....1..2..1
..1..0..0....2..0..0....1..0..0....2..0..1....1..0..0....2..0..0....2..0..0
..2..0..0....1..0..0....2..0..0....1..0..2....1..0..0....1..0..0....1..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 31 2014
STATUS
approved