OFFSET
1,2
COMMENTS
Column 3 of A222378
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..130
EXAMPLE
Some solutions for n=4
..0..1..0....0..0..0....0..0..1....0..0..0....0..0..0....0..0..1....0..0..0
..0..0..0....1..0..0....2..2..2....0..0..0....0..0..0....1..1..1....0..0..0
..0..0..0....1..1..1....2..2..2....0..0..1....1..0..0....1..1..1....0..1..0
..0..0..0....1..1..1....2..2..2....0..0..1....1..0..0....1..1..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 17 2013
STATUS
approved