OFFSET
1,1
COMMENTS
Diagonal of A219381.
EXAMPLE
Some solutions for n=3
..1..1..2....0..0..1....0..0..1....1..1..2....0..0..2....0..0..1....0..0..1
..1..1..2....1..0..1....1..0..0....1..1..2....1..0..2....0..0..0....0..0..1
..1..1..2....1..2..1....2..0..0....2..1..2....1..1..2....1..0..0....2..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 19 2012
STATUS
approved