OFFSET
1,1
COMMENTS
Column 4 of A208353.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..129
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..0..0..0....0..1..1..0....0..0..0..1....0..0..1..0
..1..1..1..1....1..1..1..2....0..1..2..0....1..0..1..1....2..1..1..2
..2..2..3..2....2..1..2..3....0..2..2..2....2..2..2..3....2..3..1..0
..2..0..3..3....3..0..3..2....3..1..2..0....3..0..3..3....2..3..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 25 2012
STATUS
approved