OFFSET
1,3
COMMENTS
Column 2 of A199356
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..40
EXAMPLE
Some solutions for n=4
..0..1....0..1....0..0....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..1..2....2..3....1..2....2..2....2..0....2..0....2..1....2..3....0..2....2..3
..3..3....1..0....2..3....1..3....3..2....2..3....3..3....3..0....2..1....3..2
..2..0....2..3....3..1....0..3....3..1....1..3....0..2....2..1....3..3....1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 05 2011
STATUS
approved