OFFSET
1,1
COMMENTS
Column 3 of A220943
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..21
EXAMPLE
Some solutions for n=3
..0..0..0....0..1..1....2..2..0....0..2..0....2..1..1....2..1..0....0..3..2
..3..2..2....1..1..0....0..4..1....1..0..1....0..0..1....0..1..3....0..1..1
..1..0..1....3..2..0....0..0..0....3..2..0....1..3..0....1..0..1....0..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 25 2012
STATUS
approved