OFFSET
1,1
COMMENTS
Diagonal of A250592
EXAMPLE
Some solutions for n=3
..0..0..0..0....0..0..0..2....0..0..1..1....0..1..1..1....0..0..0..0
..0..0..1..1....1..1..1..2....1..1..2..2....1..1..1..2....0..0..0..2
..2..1..1..2....1..1..2..1....2..1..2..2....2..1..2..2....0..1..2..1
..0..2..2..1....0..2..1..2....0..2..2..2....1..2..2..2....0..2..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 25 2014
STATUS
approved