OFFSET
1,2
COMMENTS
Diagonal of A222986
EXAMPLE
Some solutions for n=3
..0..1..1....0..0..1....0..0..0....0..1..1....0..0..0....0..0..1....0..0..1
..1..1..1....2..0..0....0..0..1....1..1..1....1..2..2....0..1..1....0..0..0
..1..1..2....0..0..0....0..2..2....1..1..0....2..2..2....1..1..1....0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 11 2013
STATUS
approved