OFFSET
1,2
COMMENTS
Diagonal of A231785
EXAMPLE
Some solutions for n=3
..0..0..0....0..1..1....0..2..1....0..1..2....0..2..1....0..1..1....0..1..1
..1..0..1....2..1..1....1..1..1....0..1..0....2..2..1....0..2..0....2..1..1
..2..2..1....2..2..0....1..1..2....2..2..0....2..2..1....2..2..0....2..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 13 2013
STATUS
approved