OFFSET
1,1
COMMENTS
Column 4 of A221139
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..23
EXAMPLE
Some solutions for n=3
..2..2..2..1....2..1..1..1....1..2..2..0....0..1..2..0....2..2..1..0
..1..0..1..1....2..1..0..1....1..0..1..2....2..2..1..0....0..1..1..1
..1..0..0..1....0..2..1..0....1..1..0..1....0..1..2..1....1..2..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 02 2013
STATUS
approved