OFFSET
1,2
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..13
EXAMPLE
Some solutions for n=4
..0..2..0..2....0..0..2..3....0..0..0..3....0..2..1..2....0..2..3..0
..2..1..1..0....0..1..2..1....0..2..0..3....2..0..0..2....2..2..3..2
..0..1..2..3....2..2..0..3....0..0..2..2....1..0..1..3....3..3..1..3
..2..0..3..0....3..1..3..0....3..3..2..0....2..2..3..0....0..2..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 31 2012
STATUS
approved