OFFSET
1,1
COMMENTS
Column 6 of A221200
EXAMPLE
Some solutions for n=3
..0..1..2..1..2..0....0..1..1..1..1..0....0..1..2..2..2..2....0..1..1..1..2..0
..0..2..2..1..0..1....0..2..2..1..2..1....0..1..1..1..1..0....0..1..1..2..2..1
..0..2..1..0..2..1....0..1..1..2..2..0....0..1..2..1..1..0....0..2..1..0..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2013
STATUS
approved