OFFSET
1,1
COMMENTS
Column 1 of A237875
EXAMPLE
Some solutions for n=2
..0..3..0....0..1..1....0..3..1....0..0..1....0..3..1....0..1..1....0..0..1
..1..1..3....2..3..1....2..1..2....2..2..1....3..0..0....3..2..0....3..1..3
..2..3..3....2..0..0....1..0..1....1..2..1....3..2..1....3..1..3....1..2..0
..3..0..1....1..3..3....2..2..3....3..1..2....1..1..2....1..1..1....2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 14 2014
STATUS
approved