OFFSET
1,2
COMMENTS
Diagonal of A230977
EXAMPLE
Some solutions for n=2
..0..2..0..2....0..3..0..3....0..1..0..1....0..1..0..3....0..3..0..1
..1..1..3..3....2..1..0..3....2..1..2..3....2..1..0..3....0..1..2..1
..2..0..0..2....0..1..2..3....2..3..0..1....2..3..0..3....0..1..2..1
..3..3..1..3....0..3..0..1....2..3..0..3....2..3..2..3....0..3..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 02 2013
STATUS
approved