OFFSET
1,2
COMMENTS
Row 4 of A221609
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..18
EXAMPLE
Some solutions for n=3
..0..2..0....0..1..1....0..2..1....1..2..0....0..2..1....1..2..0....0..2..1
..1..2..0....0..3..1....0..2..0....0..2..0....0..2..0....0..2..1....0..2..1
..1..2..0....1..2..1....2..2..0....2..2..0....1..2..0....0..1..1....0..3..1
..2..2..0....0..2..0....0..2..1....0..2..1....2..2..0....1..3..0....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 20 2013
STATUS
approved