OFFSET
1,2
COMMENTS
Row 3 of A216084
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..41
EXAMPLE
Some solutions for n=4
..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1
..2..x..0..x....1..x..0..x....2..x..0..x....2..x..3..x....2..x..3..x
..x..1..x..2....x..2..x..0....x..2..x..1....x..0..x..3....x..2..x..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 01 2012
STATUS
approved