OFFSET
1,1
COMMENTS
Diagonal of A205215
EXAMPLE
Some solutions for n=4
..2..1..0..2..1....0..2..2..0..0....1..0..0..2..2....1..0..2..2..0
..2..0..0..2..1....2..2..2..0..0....1..0..0..2..2....0..0..1..1..0
..1..0..0..1..1....2..2..2..0..0....1..0..0..2..2....2..0..1..1..0
..0..0..0..1..2....1..1..1..0..0....1..0..0..2..2....1..0..2..2..0
..1..0..0..0..1....0..0..0..0..0....2..0..0..1..1....1..0..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 23 2012
STATUS
approved