OFFSET
1,1
COMMENTS
Diagonal of A239819
EXAMPLE
Some solutions for n=3
..3..2..2....3..2..0....3..0..0....3..2..2....2..3..3....3..2..0....2..3..3
..3..0..1....2..1..0....1..0..2....3..2..2....2..1..1....2..0..0....2..3..3
..2..0..1....3..1..3....2..0..1....1..2..0....2..3..2....1..2..2....3..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 27 2014
STATUS
approved