OFFSET
1,1
COMMENTS
Diagonal of A206085
EXAMPLE
Some solutions for n=4
..0..1..2..1..3....1..1..1..3..3....2..1..1..2..2....1..1..3..3..0
..0..1..1..1..2....3..3..1..2..2....0..1..2..2..0....3..1..1..3..3
..0..0..0..1..1....1..3..1..1..1....0..1..1..2..2....1..1..2..2..3
..0..1..1..1..2....1..1..1..3..3....0..0..1..1..1....2..1..1..2..2
..1..1..0..1..1....1..2..1..3..0....2..0..1..3..3....3..3..1..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 03 2012
STATUS
approved