OFFSET
1,2
COMMENTS
Row 4 of A221419
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..33
EXAMPLE
Some solutions for n=3
..2..0..2....2..0..2....0..2..0....2..0..2....0..2..0....2..0..0....2..2..0
..0..2..0....0..2..0....2..2..2....0..2..0....2..0..0....2..2..2....0..0..2
..0..2..0....0..2..2....0..2..0....2..0..0....2..2..0....0..0..2....2..2..0
..0..2..2....0..0..2....0..2..0....0..2..2....2..0..2....0..2..0....0..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2013
STATUS
approved