OFFSET
1,1
COMMENTS
Column 5 of A240153
EXAMPLE
Some solutions for n=4
..2..2..3..3..2....3..2..3..2..2....2..2..3..3..2....3..2..3..3..3
..0..0..2..1..1....3..2..1..1..2....0..2..2..3..1....3..2..1..2..2
..2..2..0..3..3....2..2..0..3..3....2..0..0..0..2....2..2..3..3..1
..2..0..1..2..1....3..1..0..0..2....0..0..0..0..3....3..1..3..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 02 2014
STATUS
approved