OFFSET
1,2
COMMENTS
Diagonal of A208353
EXAMPLE
Some solutions for n=4
..0..1..1..0....0..0..1..0....0..0..1..0....0..1..1..1....0..0..0..0
..0..1..2..0....2..1..1..2....0..2..2..1....0..0..1..2....1..1..1..1
..0..2..2..2....2..3..1..0....3..3..3..0....3..3..3..3....2..2..2..3
..3..1..2..0....2..3..3..2....1..3..0..0....1..2..1..2....0..2..3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 25 2012
STATUS
approved