OFFSET
1,1
COMMENTS
Diagonal of A239599
EXAMPLE
Some solutions for n=4
..3..2..2..0....3..0..0..0....3..2..2..0....3..2..3..2....3..2..2..0
..2..1..2..2....3..2..3..2....2..1..2..0....2..1..2..2....2..1..2..0
..3..2..2..2....2..1..1..2....3..1..3..0....3..2..0..0....3..2..3..3
..2..3..2..0....3..2..2..0....3..2..2..2....2..1..0..0....2..1..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 22 2014
STATUS
approved