OFFSET
1,2
COMMENTS
Column 5 of A221800
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..21
EXAMPLE
Some solutions for n=3
..0..1..1..1..1....0..1..1..1..1....0..1..1..0..1....1..1..1..1..1
..2..2..1..2..1....2..2..1..1..2....2..2..1..1..2....0..1..1..1..1
..0..1..1..1..0....0..1..1..0..1....0..1..1..1..1....1..2..1..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 26 2013
STATUS
approved