OFFSET
1,1
COMMENTS
Diagonal of A239858
EXAMPLE
Some solutions for n=4
..3..2..3..3....2..3..3..2....2..3..3..2....2..3..3..2....2..3..3..2
..2..1..2..2....3..1..1..3....3..1..1..3....3..1..1..3....3..1..2..3
..3..0..0..2....3..1..2..0....3..1..2..0....3..1..1..3....2..3..2..0
..3..2..2..0....2..3..3..3....2..3..0..3....3..2..3..3....2..1..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 28 2014
STATUS
approved