OFFSET
1,2
COMMENTS
Diagonal of A203846
EXAMPLE
Some solutions for n=4
..1..3..3..0....0..3..3..2....3..3..2..0....2..2..0..0....0..2..3..3
..1..3..3..2....2..3..3..2....3..3..2..1....2..2..0..0....1..2..3..3
..2..3..3..2....2..1..0..2....0..0..3..3....0..3..3..1....3..3..0..3
..2..2..2..2....2..2..2..2....0..0..3..3....0..3..3..1....3..3..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 06 2012
STATUS
approved