OFFSET
1,1
COMMENTS
Diagonal of A206512
EXAMPLE
Some solutions for n=4
..1..2..0..1..1....1..0..2..1..1....0..2..1..2..1....2..0..1..0..1
..2..1..1..0..2....1..2..1..0..2....1..1..1..2..0....2..0..2..1..0
..1..0..2..1..0....1..1..0..1..0....1..2..2..1..1....2..1..0..2..1
..2..1..0..2..1....2..2..1..2..1....1..1..1..0..2....0..2..1..0..2
..0..2..1..0..2....0..1..2..1..0....0..0..2..1..0....1..0..2..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 08 2012
STATUS
approved