OFFSET
1,1
COMMENTS
Column 5 of A202931.
EXAMPLE
Some solutions for n=2
..2..1..1..2..0....1..1..2..1..0....2..1..1..1..2....2..2..1..1..1
..1..0..2..2..2....0..1..2..2..1....1..0..1..0..2....0..2..1..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 26 2011
STATUS
approved