OFFSET
1,1
COMMENTS
Column 2 of A214384
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..18
EXAMPLE
Some solutions for n=3
....1......1......0......0......1......1......2......2......0......1......1
...2.1....0.2....0.1....1.0....1.0....1.0....2.1....2.1....0.2....2.1....2.0
..2.0.2..0.1.2..1.0.1..0.2.0..1.0.2..0.1.0..2.1.2..0.2.1..0.2.1..0.2.1..0.2.0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 14 2012
STATUS
approved