OFFSET
1,2
COMMENTS
Column 2 of A222842
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=3
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..0
..2..3....1..2....1..0....2..3....2..3....2..3....2..0....0..0....2..2....1..2
..1..3....2..3....0..1....0..3....1..0....3..1....0..1....2..1....2..3....2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 06 2013
STATUS
approved