OFFSET
1,2
COMMENTS
Row 4 of A221483
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..23
EXAMPLE
Some solutions for n=3
..1..2..0....0..2..0....0..3..0....1..1..1....0..2..0....0..3..0....0..1..0
..0..3..1....1..2..1....2..1..0....0..2..0....1..3..1....1..2..1....2..3..0
..1..1..1....0..3..1....0..2..2....1..2..1....1..1..1....1..1..0....0..2..1
..0..2..0....0..1..1....0..2..0....0..3..0....0..2..0....0..2..1....0..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2013
STATUS
approved