OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..15
EXAMPLE
Some solutions for n=3
..2..2..3..1....2..2..1..3....0..0..0..0....0..0..1..2....2..0..3..1
..2..0..0..1....2..0..1..3....0..2..2..0....0..2..1..3....0..2..3..0
..3..0..1..2....1..1..1..0....0..2..1..2....1..1..3..2....3..3..0..2
..1..1..2..1....3..3..0..1....0..0..2..3....2..3..2..3....1..0..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 31 2012
STATUS
approved