OFFSET
1,1
COMMENTS
Diagonal of A219460
EXAMPLE
Some solutions for n=3
..2..2..2....2..1..1....1..1..1....1..1..1....2..2..3....0..0..2....2..2..2
..1..0..0....0..0..0....1..0..0....1..1..1....2..2..3....0..0..0....2..2..2
..1..0..0....0..0..0....2..0..0....1..1..2....2..2..3....0..0..0....3..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 20 2012
STATUS
approved