OFFSET
1,2
COMMENTS
Column 3 of A222430
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..190
EXAMPLE
Some solutions for n=4
..0..0..0....0..1..0....0..0..0....0..1..1....0..0..1....0..1..1....0..0..1
..0..1..1....1..0..0....0..0..0....1..1..1....2..2..2....2..2..2....0..0..0
..1..1..1....0..0..0....0..1..0....0..1..1....2..2..2....2..2..2....0..0..0
..1..1..1....0..0..0....1..1..1....1..1..1....2..2..2....2..2..2....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 19 2013
STATUS
approved