OFFSET
1,1
COMMENTS
Diagonal of A219578
EXAMPLE
Some solutions for n=3
..1..1..0....0..0..0....3..0..0....2..0..0....1..1..0....1..1..1....0..0..0
..3..0..0....0..0..0....3..2..0....2..2..0....2..0..0....1..1..0....2..0..0
..3..0..0....1..1..1....3..3..2....2..1..1....2..0..0....2..0..0....2..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 23 2012
STATUS
approved