OFFSET
1,2
COMMENTS
Column 3 of A221873
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..82
EXAMPLE
Some solutions for n=3
..0..1..0....0..1..1....0..0..1....1..0..0....2..1..1....0..1..1....0..3..0
..1..2..4....1..1..3....1..3..3....1..3..1....0..2..1....2..3..0....1..1..1
..0..1..0....0..1..1....0..1..0....1..2..0....0..1..1....1..1..0....1..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 28 2013
STATUS
approved