OFFSET
1,3
COMMENTS
Column 2 of A199201
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..46
EXAMPLE
Some solutions for n=4
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..1..2....2..3....2..3....1..0....2..3....2..0....2..3....2..0....2..0....1..2
..0..3....3..1....0..2....2..3....3..1....3..2....0..1....1..3....3..1....3..0
..3..2....0..2....3..1....3..2....2..0....1..3....3..2....3..2....2..3....2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 03 2011
STATUS
approved