OFFSET
1,2
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..13
EXAMPLE
Some solutions for n=3
..0..1..1..2....0..1..0..1....0..1..2..0....0..1..2..3....0..1..0..3
..1..1..0..3....1..2..1..3....1..0..1..3....1..2..3..1....1..2..0..2
..1..0..1..2....0..1..0..3....2..1..1..1....2..3..0..0....0..0..3..3
..2..3..2..2....1..3..3..1....0..3..1..3....3..1..0..1....3..2..3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2012
STATUS
approved