OFFSET
1,1
COMMENTS
Diagonal of A251055
EXAMPLE
Some solutions for n=4
..0..1..1..1..3....0..0..3..0..3....2..0..3..0..3....0..0..1..1..2
..0..0..0..0..0....0..0..3..0..3....2..0..3..0..2....1..0..0..0..0
..1..1..1..1..1....0..0..3..0..2....2..0..3..0..1....2..0..0..0..0
..0..0..0..0..0....0..0..3..0..2....2..0..3..0..1....2..0..0..0..0
..2..2..0..0..0....0..0..3..0..0....3..0..3..0..0....3..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2014
STATUS
approved