OFFSET
1,1
COMMENTS
Diagonal of A251037.
EXAMPLE
Some solutions for n=2
..2..1..2....1..1..2....1..1..0....3..0..2....1..2..0....1..3..1....0..0..1
..2..1..3....1..1..2....1..1..1....3..0..3....1..3..2....1..2..2....1..1..3
..3..2..2....1..2..3....1..2..2....3..0..1....1..3..2....2..3..3....2..3..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2014
STATUS
approved