OFFSET
1,1
COMMENTS
Diagonal of A206635
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..0..1..2..2....0..0..0..1..2....0..0..0..0..0
..0..1..0..2..1....2..2..1..1..1....2..1..0..0..1....1..2..1..0..0
..1..1..2..0..2....1..0..0..0..0....1..1..0..2..1....2..0..0..2..1
..2..0..1..1..0....1..1..1..0..2....2..2..2..0..2....2..1..1..1..1
..1..1..1..1..1....1..2..1..1..1....1..1..1..1..0....2..0..1..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 10 2012
STATUS
approved