OFFSET
1,2
COMMENTS
Column 2 of A223473
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..0..1....0..1....0..1....0..0....0..1....0..1....0..1....0..1....0..1....0..1
..2..2....2..2....2..2....1..2....2..2....1..2....1..2....2..2....2..0....2..2
..0..1....0..0....1..1....0..0....0..2....1..0....0..0....0..1....1..0....1..2
..2..0....1..2....2..0....2..1....2..1....2..1....2..1....2..2....2..0....2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 20 2013
STATUS
approved