OFFSET
1,1
COMMENTS
Diagonal of A217547
EXAMPLE
Some solutions for n=3
..2..2..2....2..2..2....1..1..2....1..1..2....1..0..0....2..1..1....1..0..0
..0..0..2....1..0..0....1..1..2....1..0..0....0..0..0....1..1..1....1..0..0
..0..0..2....1..0..0....1..1..2....1..0..0....0..0..0....1..1..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 06 2012
STATUS
approved