OFFSET
1,2
COMMENTS
Diagonal of A199230
EXAMPLE
Some solutions for n=4
..0..1..2..1....0..1..0..0....0..1..0..0....0..1..2..1....0..1..0..1
..1..2..0..0....2..0..2..2....2..1..2..2....0..2..0..0....1..2..2..1
..2..1..2..1....1..2..1..1....0..2..0..1....2..0..1..2....1..0..1..2
..1..2..0..0....1..0..0..2....1..0..1..2....1..2..1..2....0..2..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 04 2011
STATUS
approved