OFFSET
1,2
COMMENTS
Column 2 of A223149
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..192
EXAMPLE
Some solutions for n=3
..0..0....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..1..0....1..2....2..2....2..2....1..0....2..1....2..0....0..2....2..0....2..1
..2..1....0..1....0..2....2..0....2..1....1..2....2..2....1..0....2..1....0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2013
STATUS
approved