OFFSET
1,1
COMMENTS
Diagonal of A251819
EXAMPLE
Some solutions for n=3
..0..1..1..0..1....1..0..2..0..0....1..1..0..1..1....1..0..2..0..0
..1..1..1..1..1....1..0..1..1..0....2..1..2..2..1....2..1..2..2..1
..1..1..1..1..1....1..2..2..1..2....2..0..0..2..0....0..1..1..0..1
..0..1..1..1..0....0..0..2..0..0....1..1..0..1..1....0..0..2..0..1
..1..1..0..1..1....1..0..1..1..0....2..1..2..2..1....2..1..2..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 09 2014
STATUS
approved