OFFSET
1,1
COMMENTS
Column 1 of A223159
EXAMPLE
Some solutions for n=1
..3..1..1....3..1..2....1..1..2....3..0..3....3..2..2....3..0..3....3..1..3
..2..0..1....2..0..0....0..0..2....0..0..1....1..0..0....1..0..1....2..0..2
..2..1..2....3..0..3....1..1..3....3..1..1....3..0..0....3..2..3....2..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2013
STATUS
approved