OFFSET
1,2
COMMENTS
Column 5 of A199041
EXAMPLE
Some solutions for n=4
..0..1..2..1..1....0..0..1..2..2....0..1..2..2..1....0..0..0..1..1
..0..1..2..2..1....2..2..1..2..2....0..1..2..0..1....2..2..0..0..0
..0..0..0..0..2....0..0..0..1..1....0..1..1..0..2....1..2..2..2..0
..1..1..2..2..2....1..1..0..0..1....0..0..2..2..2....1..1..1..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 02 2011
STATUS
approved