OFFSET
1,2
COMMENTS
Column 3 of A217227
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..18
EXAMPLE
Some solutions for n=3
..1..1..0....1..1..0....1..1..0....1..2..1....1..2..1....0..1..0....1..2..1
..2..1..0....2..2..0....1..1..2....1..1..1....1..1..2....1..2..2....2..1..1
..1..2..1....1..2..0....1..1..1....1..1..0....0..0..1....1..1..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 07 2013
STATUS
approved