OFFSET
1,1
COMMENTS
Diagonal of A251923
EXAMPLE
Some solutions for n=4
..2..3..2..0..2..3....1..0..1..3..1..0....3..2..0..2..3..2....3..1..3..1..3..1
..3..2..0..2..3..2....3..1..3..1..3..1....2..0..2..0..2..3....1..0..1..3..1..0
..2..0..2..0..2..0....1..3..1..0..1..3....0..2..0..2..0..2....3..1..3..1..3..1
..0..2..3..2..0..2....3..1..3..1..0..1....2..0..2..3..2..0....1..3..1..3..1..3
..2..3..2..0..2..0....1..3..1..3..1..3....0..2..3..2..0..2....0..1..3..1..0..1
..2..2..0..2..0..2....3..1..3..1..3..1....2..0..2..0..2..0....1..3..1..3..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 11 2014
STATUS
approved